Cascio, Wayne F., author
Reston Pub. Co, 1982
Buku Teks
Reis, Matthew, author
American Management Association, 2010
eBooks
Fulmer, Robert M., author
Richard D. Irwin , 1983
Buku Teks
Maier, Norman R.F., author
Hougtton-Mifflin, 1965
Buku Teks
edited by Edwin A. Fleishman
Dorsey Press, 1967
Buku Teks