Empey, LaMar T.
Aldine Publishing Company, 1971
Buku Teks
Lubeck, Steven G.
Aldine Publishing Company, 1971
Buku Teks
Lukes, Steven
Columbia University Press, 1977
Buku Teks
John E. Tropman, John L. Erlich, Jack Rothman
F.E.Peacock, 2001
Buku Teks
John E. Tropman, John L. Erlich, Jack Rothman
Peacock Publishers, 2001
Buku Teks