Não informado. (1910). Guernsey Breeders Journal. American Guernsey Cattle Club.
Style de citation Chicago (17e éd.)Não informado. Guernsey Breeders Journal. Columbus, Ohio: American Guernsey Cattle Club, 1910.
Style de citation MLA (8e éd.)Não informado. Guernsey Breeders Journal. American Guernsey Cattle Club, 1910.
Attention : ces citations peuvent ne pas être correctes à 100%.