Wilkie, Rhoda: Livestock/deadstock: working with farm animals from birth to slaughter. Philadelphia 2010. Internet: https://books.google.de/books?id=B0CgBE155PwC&printsec=frontcover&dq=Livestock/Deadstock.+Working+with+Farm+Animals+from+Birth+to+Slaughter.&hl=en&sa=X&ved=0ahUKEwiPjLzVrPTRAhUJ1RQKHRpgBU4Q6AEIGjAA#v=onepage&q=Livestock%2FDeadstock.%20Working%20with%20Farm%20Animals%20from%20Birth%20to%20Slaughter.&f=false. Zuletzt geprüft am: 3.2.2017.