This Should be Easy… Display Part Time Jobs on a Page – Job Type Shortcode

Hi there,
I am trying to do something that should be relatively simple but cant figure out what shortcode info to put in. All I need to do is display all the part time jobs on a page. I have tried various things like:
[LISTINGS show=’20’ jobtype=’part-time’] or [LISTINGS show=’20’ type=’part-time’] but no luck.
Any help greatly appreciated,