Citing sources

Proper way to cite an email source according to the OWL at Purdue website:

No personal communication is included in your reference list; instead, parenthetically cite the communicators name, the fact that it was personal communication, and the date of the communication in your main text only.

(E. Robbins, personal communication, January 4, 2001).

A. P. Smith also claimed that many of her students had difficulties with APA style (personal communication, November 3, 2002).

Now, if I do that each and every time, my info wouldn't fit on my slide. What I did was after each answer, I put the name in parentheses. Would it work to do that and then just cite the sources on reference page? Or should we do it the proper way the first time we introduce our interviewee, and then just put their name in parentheses every time after that???

Gads, I hate citing sources...why can't they keep it simple??? 8-)