edited by John E. Tropman, John L. Erlich, Jack Rothman
F.E.Peacock, 1995
Buku Teks SO
John E. Tropman, John L. Erlich, Jack Rothman
F.E.Peacock, 2001
Buku Teks SO
Shields, James J,Jr
Frederick A. Preager, 1967
Buku Teks
Redfield, Robert
The University of Chicago Press, 1962
Buku Teks SO
Sanders, Irwin T.
Ronald Press , 1966
Buku Teks SO