Copyright ... <?php get_site_credits(); ?>

[arthur_a_keen]

I can not find the file where is located get_site_credits command.
The thing is that in my template I would like to place on similar thing - <?php get_site_credits(); ?> ------- <?php get_site_copyright(); ?>.
I understand that it can be done directly in a template - template.php - but if I have many different templates files then it would take much more time to edit them for my clients.