Hill, Charles W. L., author
Salemba Empat, 2014
Buku Teks
Rien T. Segers, editor
Springer International Publishing, 2016
eBooks
Vernon, Raymond, author
Prentice-Hall, 1996
Buku Teks
Kotabe, Masaaki, author
John Wiley & Sons, 2015
Buku Teks
Sanyal, Rajib N, author
Prentice-Hall, 2001
Buku Teks