Kaliski, Burton S.
Harcourt Brace Jovanovich, 1982
Buku Teks
Russell, Bertrand, 1872-1970
George Allen and Unwin, 1956
Buku Teks SO
Tomasowa, Francien Herlen
Lembaga Penerbitan Fakultas Pertanian Universitas Brawijaya, 2004
Buku Teks SO
Hirst, D.M.
Macmillan, 1976
Buku Teks SO
Montague, Harriet F.
Charles E. Merrill, 1963
Buku Teks SO