Cooley, Charles Horton
Schochen Books, 1972
Buku Teks SO
Dreitzel, Hans Peter
MacMillan Press , 1971
Buku Teks
Caplo, Theodore
Harcourt, Brace & World, 1964
Buku Teks SO
Beneficial Management Institute, [Date of publication not identified]
Buku Teks
Hatch, Mary Jo
Oxford University Press, 1997
Buku Teks