Johnson, Rob, author
Jones & Bartlett Learning, 2015
Buku Teks
Flynn, Nancy, author
[American Management Association;, ], 2004
eBooks
Sherman, Roger, author
Addison-Wesley, 1978
Buku Teks
McKenzie, Richard B., author
McGraw-Hill, 1980
Buku Teks
edited by Arthur L. Grey and John E. Elliot
Houghton Mifflin, 1965
Buku Teks