Martin, Chuck, author
American Management Association, 2007
eBooks
Moss, Geoffrey, author
Cengage Learning, 2012
Buku Teks
Fernandez, Juan Antonio, author
John Wiley & Sons (Asia), 2006
Buku Teks
Vance, Charles C., author
McGraw-Hill, 1974
Buku Teks
Haskell Scchell, Erwin
McGraw-Hill Book Company, INC, 1957
Buku Teks