APA (7e ed.) Bronvermelding

Não informado. (2002). Purebred picture. American Berkshire Association.

Chicago (17e ed.) Bronvermelding

Não informado. Purebred Picture. West Lafayette, Ind: American Berkshire Association, 2002.

MLA (8e ed.) Bronvermelding

Não informado. Purebred Picture. American Berkshire Association, 2002.

Let op: Deze citaties zijn niet altijd 100% accuraat.