Index: src/wp-admin/includes/class-wp-press-this.php
===================================================================
--- src/wp-admin/includes/class-wp-press-this.php	(revision 31600)
+++ src/wp-admin/includes/class-wp-press-this.php	(working copy)
@@ -31,8 +31,11 @@
 	 * @return array Site settings.
 	 */
 	public function site_settings() {
-		$html = '<p class="press-this-suggested-source">' . _x( 'Source:', 'Used in Press This to indicate where the content comes from.' ) .
-			' <cite><a href="%1$s">%2$s</a></cite></p>';
+		$default_html = array(
+			'quote' => '<blockquote>%1$s</blockquote>',
+			'link' => '<p>' . _x( 'Source:', 'Used in Press This to indicate where the content comes from.' ) .
+				' <em><a href="%1$s">%2$s</a></em></p>',
+		);
 
 		return array(
 			// Used to trigger the bookmarklet update notice.
@@ -49,13 +52,14 @@
 			'redirInParent' => apply_filters( 'press_this_redirect_in_parent', false ),
 
 			/**
-			 * Filter the HTML for the Press This source attribution.
+			 * Filter the default HTML for the Press This editor.
 			 *
 			 * @since 4.2.0
 			 *
-			 * @param string $html Default HTML, %1$s is link href, %2$s is link text.
+			 * @param array $default_html Associative array with two keys: 'quote' where %1$s is replaced with the site description
+			 *                            or the selected content, and 'link' there %1$s is link href, %2$s is link text.
 			 */
-			'suggestedHTML' => apply_filters( 'press_this_suggested_html', $html ),
+			'html' => apply_filters( 'press_this_suggested_html', $default_html ),
 		);
 	}
 
Index: src/wp-admin/js/press-this.js
===================================================================
--- src/wp-admin/js/press-this.js	(revision 31600)
+++ src/wp-admin/js/press-this.js	(working copy)
@@ -200,15 +200,14 @@
 				}
 			}
 
-			if ( text ) {
-				text = sanitizeText( text );
-				// Wrap suggested content in blockquote tag.
-				content = '<blockquote class="press-this-suggested-content">' + text + '</blockquote>';
+			if ( text && siteConfig.html.quote ) {
+				// Wrap suggested content in specified HTML.
+				content = siteConfig.html.quote.replace( /%1\$s/g, sanitizeText( text ) );
 			}
 
 			// Add a source attribution if there is one available.
-			if ( url && siteConfig.suggestedHTML && ( ( title && __( 'newPost' ) !== title ) || siteName ) ) {
-				content += siteConfig.suggestedHTML.replace( /%1\$s/g, encodeURI( url ) ).replace( /%2\$s/g, ( title || siteName ) );
+			if ( url && siteConfig.html.link && ( ( title && __( 'newPost' ) !== title ) || siteName ) ) {
+				content += siteConfig.html.link.replace( /%1\$s/g, encodeURI( url ) ).replace( /%2\$s/g, ( title || siteName ) );
 			}
 
 			return content || '';