Jerrard, Jane, author
American Management Association, 2009
eBooks
Pitman, Randy, author
G.K. Hall & Co., 1992
Buku Teks
compiled by Oscar Riera Ojeda ; introduction by Paul Goldberger
Monacelli Press, Monacelli Press
Buku Teks
Delmon, Jeffrey, author
Sweet & Maxwell, 2000
Buku Teks
D.C. TAM , 1973
Buku Teks