Looking after your body: An owner's guide to successful aging. Reader's Digest.
Chicago-referens (17:e uppl.)Looking After Your Body: An Owner's Guide to Successful Aging. New York: Reader's Digest.
MLA-referens (9:e uppl.)Looking After Your Body: An Owner's Guide to Successful Aging. Reader's Digest.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.