Learned, Edmund P. (Edmund Philip), 1900-1991, author
Andover Press, 1957
Buku Teks
Korgen, Kathleen Odell, author
Sage, 2019
Buku Teks
Hayakawa, S.I., author
Harcourt, Brace, 1940
Buku Teks
Beneficial Management Institute, [Date of publication not identified]
Buku Teks
Huxley, Julian, author
New American Library, 1957
Buku Teks