Stryker, Perrin, editor
Harper & Row, [date of publication not identified]
Buku Teks
Bernard, Chester I.
Harvard University Press , 1966
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Times Books International, 1985
Buku Teks
Mahoney, Thomas A.
Prentice-Hall, 1961
Buku Teks
Uris, Auren
McGraw-Hill , 1957
Buku Teks