Load jQuery UI In Wordpress Plugin

//jquery ui scripts are included in Wordpress by default
//Reference: http://codex.wordpress.org/Function_Reference/wp_enqueue_script#Default_scripts_included_with_WordPress
    	wp_enqueue_script('jquery-ui-core');
	wp_enqueue_script('jquery-ui-datepicker');
	//jquery ui style is not built-in by default, therefore load it from google CDN
	wp_enqueue_style('jquery-style', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/themes/smoothness/jquery-ui.css');