Lopez, S. (1990). The U-factor weight management program. Key Porter Books.
Lua i Stíl Chicago (17ú heag.)Lopez, Sandra. The U-factor Weight Management Program. Toronto: Key Porter Books, 1990.
Lua MLA (8ú heag.)Lopez, Sandra. The U-factor Weight Management Program. Key Porter Books, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.