Cox, George W.
Wm. C. Brown, 1996
Buku Teks
McNaughton, S.J.
Gadjah Mada University Press, 1990
Buku Teks
Brower, James E.
Dubuque Wm. C. Brown , 1990
Buku Teks
Brewer, Richard
Saunders College Publishing, 1994
Buku Teks
Ehrlich, Paul R.
Macmillan, 1987
Buku Teks