Muchinsky, Paul M., author
Wadsworth, 2000
Buku Teks
Bass, Bernard M., author
Allyn and Bacon, 1973
Buku Teks
John Wiley & Sons , 2009
Buku Teks
Kolb, David A., author
Prentice-Hall, 1984
Buku Teks
Schein, Edgar H., author
Prentice-Hall, 1980
Buku Teks