WordPress page template partial for Theme Foundry's Make theme modified to display Co-Authors and Guest Authors created with the Co-Authors Plus plugin.

entry-author.php

<?php
/**
 * @package Make
 */

// Modified for use with Co-Authors Plus - dan@newlocalmedia - 1-27-17 - Make 1.8.3

$author_key    = 'layout-' . make_get_current_view() . '-post-author';
$author_option = make_get_thememod_value( $author_key );
?>

<?php if ( 'none' !== $author_option ) : ?>
	<?php if ( function_exists( 'get_coauthors' ) ) { ?>
        <?php $coauthors = get_coauthors(); ?>
		<?php foreach ( $coauthors as $coauthor ) { ?>
			<div class="entry-author">
				<?php if ( 'avatar' === $author_option ) : ?>
					<div class="entry-author-avatar">
						<?php 
						printf(
							'<a class="vcard" title="%1$s" href="%2$s">%3$s</a>',
							esc_attr( $coauthor->display_name ),
							esc_url( get_author_posts_url( $coauthor->ID, $coauthor->user_nicename ) ),
							coauthors_get_avatar( $coauthor, 65 )
						); ?>
					</div>
				<?php endif; ?> <!-- End Co-Author Avatar .entry-author-avatar -->

				<div class="entry-author-byline">
					<?php
					printf(
					// Translators: the following text string (outside the author name variable '%s') is an attribution of a post author. e.g. 'by' Ernest Hemingway.
						esc_html__('%s', 'make' ),
						sprintf(
							'<a class="vcard fn" href="%1$s">%2$s</a>',
							esc_url( get_author_posts_url( $coauthor->ID, $coauthor->user_nicename ) ),
							esc_attr( $coauthor->display_name )
							)
						);
					?>
				</div>

				<?php if ( isset( $coauthor->type ) && 'guest-author' == $coauthor->type ) { ?> <!-- Guest Author Bio -->
					<?php if ( $coauthor->description ) : ?>
				    	<div class="entry-author-bio">
				    		<?php echo wpautop( Make()->sanitize()->sanitize_text( $coauthor->description ) ); ?>
				    	</div>
				    <?php endif; ?>
				<?php } else if ( $coauthor->user_description ) { ?> <!-- Co-Author Bio -->
    				<div class="entry-author-bio">
        				<?php echo wpautop( Make()->sanitize()->sanitize_text( $coauthor->user_description ) ); ?>
    				</div>
				<?php } ?>

			</div> <!-- End Author Box .entry-author -->

		<?php } ?> <!-- End Co-Authors Loop -->
    	 
	<?php } else { ?> <!-- If no Co-Authors do Single Author -->

		<div class="entry-author">

			<?php if ( 'avatar' === $author_option ) : ?>
				<div class="entry-author-avatar">
					<?php
					printf(
						'<a class="vcard" href="%1$s">%2$s</a>',
						esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
						get_avatar( get_the_author_meta( 'ID' ) )
					);
					?>
				</div>
			<?php endif; ?>

			<div class="entry-author-byline">
				<?php
				printf(
					// Translators: the following text string (outside the author name variable '%s') is an attribution of a post author. e.g. 'by' Ernest Hemingway.
					esc_html__( '%s', 'make' ),
					sprintf(
						'<a class="vcard fn" href="%1$s">%2$s</a>',
						esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
						esc_html( get_the_author_meta( 'display_name' ) )
						)
					);
				?>
			</div>

			<?php if ( is_singular() && $author_bio = get_the_author_meta( 'description' ) ) : ?>
				<div class="entry-author-bio">
					<?php echo wpautop( Make()->sanitize()->sanitize_text( $author_bio ) ); ?>
				</div>
			<?php endif; ?>

		</div> <!-- End Author Bix .entry-author -->

	<?php } ?> <!-- End Single Author Loop -->

<?php endif; ?> <!-- End Author Block -->