Goetsch, David L., author
Pearson, 2016
Buku Teks
edited by I. Arjang Assad, Edward A. Wasil, Gary L. Lilien
Prentice-Hall, 1992
Buku Referensi
Waters, Donald, author
Addison-Wesley, 1998
Buku Teks
Lasher, William R., author
Western College Publishing , 2000
Buku Teks
Kinicki, Angelo, author
McGraw-Hill, 2008
Buku Teks