APA-referens (7:e uppl.)
O'Hagan, T. (1994). Readers digest south african family guide to natural medicine. The readers digest association south africa limited.
Chicago-referens (17:e uppl.)
O'Hagan, Tim. Readers Digest South African Family Guide to Natural Medicine. Cape Town: The readers digest association south africa limited, 1994.
MLA-referens (9:e uppl.)
O'Hagan, Tim. Readers Digest South African Family Guide to Natural Medicine. The readers digest association south africa limited, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.