Stroman, James
American Management Association, 2008
eBooks
Stroman, James
American Management Association, 2012
eBooks
Kinn, Mary E.
W.B. Saunders, 1999
Buku Teks
De Vries, Mary Ann
Prentice-Hall, 1991
Buku Referensi
Boston: Houghton: 1993,
Buku Referensi