Rosenblun, Michsel, author
McGraw-Hill, 2013
Buku Teks
Mills, Harry, author
American Management Association, 2007
eBooks
Sutton, Garrett, author
Gramedia Pustaka Utama, 2005
Buku Teks
Smolin, C. Roger
Wiley, 1981
Buku Teks
Adams, Charles K.
Tab Books, 1980
Buku Teks