Lewis, Michael, author
Penguin Books, 2015
Buku Teks
Willis, Connie
Bantam Books, 1992
Buku Teks
Hwang, Kai, author
John Wiley & Sons, 2017
Buku Teks
Sheldon, Sidney, author
Gramedia , 2005
Buku Teks
Andri Apriyana SA, author
2017
UI - Tesis Membership