http://blogsessive.com/blogging-tools/latest-posts-by-category-archive/
http://codex.wordpress.org/Function_Reference/in_category
<strong>http://codex.wordpress.org/Function_Reference/get_the_category</strong>
<div>LATEST ARTICLES</div>
$args = array(‘orderby’ => ‘name’, ‘numberposts’ =>3, ‘category’ => 3, ‘order’=> ‘ASC’, ‘orderby’ => ‘title’ );
$postslist = get_posts( $args );
foreach ($postslist as $post) : setup_postdata($post); ?>
<div>
<div>ID, ‘thumbnail’);
echo get_the_post_thumbnail($page->ID, ‘full’);
?></div>
$category = get_the_category();
$category_id = get_cat_ID(‘3′);
// Get the URL of this category
$category_link = get_category_link($category_id);
//echo $category[3]->cat_name; ?>
<h4>cat_name.'”>’.$category[3]->cat_name.”; ?></h4>
</div>
that’s all :)