Wexley, Kenneth N., author
Irwin, 1984
Buku Referensi
Spector, Paul E., author
Jones & Bartllett, 2012
Buku Teks
Cascio, Wayne F., author
McGraw-Hill, 1986
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1962
Buku Teks
Lovejoy, Laurence C., author
Aleander Hamilton Institute, 1962
Buku Teks