Morris, Robert
Columbia University Press , 1966
Buku Teks
Jones, Mari C.
Routledge , 2006
Buku Teks
Moore, Wilbert E. (Wilbert Ellis)
Prentice-Hall, 1963
Buku Teks
edited by Robert A. Nisbet
Blackwell, 1972
Buku Teks
edited with an introduction by Robert A. Nisbet
Harper Torchbooks, 1972
Buku Teks