Koller, Tim
John Wiley & Sons, 2010
Buku Teks
Hoadley, Mason C
Amsterdam University Press, 2019
eBooks
Bowring, Richard
Oxford University Press, 2017
eBooks
Moore, John A.
Harvard University Press , 1999
Buku Teks
Fulmer, Robert M.
American Management Association, 2008
eBooks