People Picker in custom aspx page

peoplePicker.aspx

<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=16.0.0.0, Culture=neutral, PublicKeyToken=your page token here" %>
<asp:Content ContentPlaceHolderId="PlaceHolderMain" runat="server">
<fieldset>
<div class="form-group">
  <label class="col-md-4 control-label" for="textinput">Owner</label>  
  <div class="col-lg-7">
  <div class="input-group">
		<SharePoint:ClientPeoplePicker
	        Required="true"
	        AllowEmailAddresses="true"
	        ValidationEnabled="true"
	        ID="owner"
	        runat="server"
	        InitialHelpText="Enter name/email address"
	        VisibleSuggestions="3"
	        Rows="1"
	        AllowMultipleEntities="false"
	        CssClass="ms-long ms-spellcheck-true form-control input-md"/>
	   </div>
  </div>
</div>
</fieldset>
</asp:Content>