APA-Zitierstil (7. Ausg.)

Porter, V. (1993). Pigs: A handbook of the breeds of the world. Helm Information.

Chicago-Zitierstil (17. Ausg.)

Porter, Valerie. Pigs: A Handbook of the Breeds of the World. Mountfield, East Sussex: Helm Information, 1993.

MLA-Zitierstil (9. Ausg.)

Porter, Valerie. Pigs: A Handbook of the Breeds of the World. Helm Information, 1993.