In a functions.php file use this:

function add_google_fonts() {
wp_register_style('GoogleFonts', 'http://fonts.googleapis.com/css?family=Coda|Contrail+One');

wp_enqueue_style('GoogleFonts');
}
 
add_action('wp_print_styles', 'add_google_fonts');

Change the font names to the name you wan to us and separate multiple fonts with a '|' character