Hussey, David E., author
Pergamon Press, 1976
Buku Teks
Komaruddin Sastradipoera, author
Kappa-Sigma Publishers, 2000
Buku Teks
Mann, Roland
McGraw-Hill , 1970
Buku Teks
Sharplin, Arthur, author
McGraw-Hill, 1985
Buku Teks
Harvard Business School , 2000
Buku Teks