There's

wp_login_url, wp_logout_url, but what how about registration url?

Can there be standard method of getting connect to registration? I have to display a hyperlink to registration page with further redirect to previous page.

PS I'm using my theme login.

Just in case of hosting your wordpress site inside a subfolder (e.g.: mysite.com/myblog) you should also incorporate your site's url the following:

<?php echo get_site_url() . "/wp-login.php?action=register" ?>

--> http://mysite.com/myblog/wp-login.php?action=register

Otherwise you'll be rerouted to some non-existing page

--> http://mysite.com/wp-login.php?action=register

The next will return the registration url:

<?php

    echo site_url('/wp-login.php?action=register');

?>

UPDATE:

To obtain the registration url having a redirect to the present page use:

<?php

    echo site_url('/wp-login.php?action=register&redirect_to=' . get_permalink());

?>