Morris, Robert
Columbia University Press , 1966
Buku Teks SO
Lauer, Robert H.
Rineka Cipta, 2003
Buku Teks SO
Moore, Wilbert Ellis
Prentice-Hall, 1963
Buku Teks SO
edited with an introduction by Robert A. Nisbet
Harper Torchbooks, 1972
Buku Teks SO
edited by Robert A. Nisbet
Blackwell, 1972
Buku Teks SO