Luft, Joseph
National Press Books, 1970
Buku Teks SO
Luft, Joseph
Mayfield Publishing Company, 1984
Buku Teks SO
Shaw, Marvin E.
McGraw-Hill, 1981
Buku Teks SO
edited by Graham S. Gibbard, John J. Hartman, Richard D. Mann
Jossey-Bass, 1976
Buku Teks SO
editor, Lawrence R. Frey
Sage, 2002
Buku Teks SO