consultant editor, Michael Armstrong
AP Information Services, 1997
Buku Referensi
Mondy, R. Wayne, author
Prentice-Hall, 2010
Buku Teks
Greenlaw, Paul S., author
Harper & Row, 1986
Buku Teks
Sikula, Andrew F., author
Wiley, 1976
Buku Teks
edited by M. Ronald Buckley, Anthony R. Wheeler, Jonathon R. B. Halbesleben
Emerald, 2017
eBooks