Help: Pulling articles based on a custom taxonomy / term

Hi,

I’m trying to do something like this:

<?php
$client = array(
'post_type' => 'Testimonials',
'taxonomy' => 'Testiominal Source',
'term' => 'Client Testimonials'

)?>

<?php query_posts($client); ?>

This is not working, what am I doing wrong? Basically I’m trying to only get articles in [Client Testimonial]. And I’m tyring, but I don’t know how to do it. And I’ve been looking online for a while now.

Thanks.