Porter, V. (2020). Mason's world dictionary of livestock breeds, types and varieties (6th edition.). CABI Publishing.
Chicago-Zitierstil (17. Ausg.)Porter, Valerie. Mason's World Dictionary of Livestock Breeds, Types and Varieties. 6th edition. Wallingford: CABI Publishing, 2020.
MLA-Zitierstil (9. Ausg.)Porter, Valerie. Mason's World Dictionary of Livestock Breeds, Types and Varieties. 6th edition. CABI Publishing, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.