Custom fields with if else conditionals

Sorry to bump but I can’t figure this out. This is what I have but I get errors and I’m basically clueless.

`<?php if (get_post_meta($post->ID, ‘source’, true) ) {
<h1>ID, “source”, $single = true); ?>” rel=”external” title=”External Link to <?php the_title(); ?>”><?php the_title(); ?></h1>
} else {
<h1>” rel=”bookmark” title=”Permanent Link to <?php the_title(); ?>”><?php the_title(); ?></h1>
}
?>`

I got it.

<?php if (get_post_meta($post->ID, 'source', true) ) { ?>
				<h1><a href="<?php echo get_post_meta($post->ID, "source", $single = true); ?>" rel="external" title="External Link to <?php the_title(); ?>"><?php the_title(); ?></a></h1>
				<?php } else { ?>
                <h1><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h1>
				<?php } ?>

thanks man, i tried almost five days to make that thing work. of course, in some other circumstances, but it worked. you rule ??