edited by Jack Pinkowski
CRC Press, 2008
Buku Referensi
Wallace, Michael
American Management Association, 2011
eBooks
Shepherd, Elizabeth J., 1960-
London, Facet
Buku Referensi
Cleland, David I.
McGraw-Hill, 2010
Buku Teks
editor in chief, Gerard H. "Gus" Gaynor
McGraw-Hill, 1996
Buku Referensi