Australian Society of Animal Production; editor, Herbert R. Axelrod, Leonard P. Schultz
Pergamon Press, 1980
Buku Referensi
P.F. Larsen, editor
Wageningen Academic;Wageningen Academic, 2012
eBooks
Orwell, George, 1903-1950
Penguin Books, 1955
Buku Teks
edited by H.H. Cole and Magnar Ronning
W.H. Freeman, 1974
Buku Teks
Bouche, R., editor
Wageningen Academic, 2011
eBooks