The Mayo Clinic diet :
[eat well, enjoy life, lose weight] /
[by the weight -loss experts at Mayo Clinic.].

APA Citation

Mayo Clinic. (2010). The Mayo Clinic diet: [eat well, enjoy life, lose weight]. Intercourse, PA: Good Books.

MLA Citation

Mayo Clinic. The Mayo Clinic Diet: [eat Well, Enjoy Life, Lose Weight]. Intercourse, PA: Good Books, 2010.

Warning: These citations may not always be complete (especially for serials).