Donnolo, Mark, author
[American Management Association, ], 2013
eBooks
Gerstner, Merrill H.
Amacom , 1974
Buku Teks
editors, Joseph de Chiara, John Handcock Callender
McGraw-Hill International Book, 1983
Buku Referensi
Frederick A. Praeger, 1967
Buku Teks
Douglas-Young, John
Parker Publishing Company, 1979
Buku Referensi