Whyte, William H., author
Simon and Schuster, 1956
Buku Teks
REC, 1968
Buku Teks
Muliyadi, author
Universitas Indonesia, 2008
UI - Tesis (Open)
Hatch, Mary Jo
Oxford University Press, 1997
Buku Teks
French, Wendell L., author
Prentice-Hall International, 1990
Buku Teks