See posts by category order

Hello,

i have this:

<?php if (have_posts()) : ?>

		<?php
		query_posts("orderby=post_date&order=asc&cat=3");
		while (have_posts()) : the_post(); ?>

<?php the_category(' '); ?> - <?php the_title(); ?>

<?php endwhile; ?>
<?php endif; ?>

i would like to transform that for:
– doesn’t show a link of the category
– see posts by category order, not date order

pleasen, help me to use get_the_category() function, i’m lost :p

bye,

Fred