Cooley, Charles Horton
Schochen Books, 1972
Buku Teks
Dreitzel, Hans Peter
MacMillan Press , 1971
Buku Teks
Thompson, Victor A.
Alfred A. Knopf, 1969
Buku Teks
Caplo, Theodore
Harcourt, Brace & World, 1964
Buku Teks
Beneficial Management Institute, [Date of publication not identified]
Buku Teks