Advertising Help Needed

could someone please tell me where the big “gurus” advertise? Which radio stations, television stations, magazines?

I can’t find any examples of advertising from Russ whitney, Carleton Sheets, Robert Allen or Ron LeGrand. Where do these guys get their students?

Thanks for any help.

I’ve noticed most of the people you mentioned have infomercials and I’ve seen their pop-ups online when I visit different sites and forums.