Buller, Jeffrey L., author
Jossey-Bass, 2012
Buku Teks
Buller, Jeffrey L., author
Jossey-Bass, 2012
Buku Teks
Lewis, James P.
McGraw-Hill, 1995
Buku Referensi
Lewis, Richard J., author
Wiley-Interscience, 2002
Buku Referensi
editors, Gerald P. Koocher, John C. Norcross, Sam S. Hill, III
Oxford University Press, 2005
Buku Teks