APA (7th ed.) Citation

Porter, V. (1991). Cattle: A handbook to the breeds of the world. Christopher Helm.

Chicago Style (17th ed.) Citation

Porter, Valerie. Cattle: A Handbook to the Breeds of the World. London: Christopher Helm, 1991.

MLA (9th ed.) Citation

Porter, Valerie. Cattle: A Handbook to the Breeds of the World. Christopher Helm, 1991.

Warning: These citations may not always be 100% accurate.