Yu Zheng
Cambridge University Press, 2013
eBooks
Staley, Eugene
McGraw-hill, 1965
Buku Teks
Bruch, Mathias
Westview Press, 1984
Buku Teks
edited by Lorraine Eden
St. Martin's Press, 1993
Buku Teks
Anastassopoulos, Jean-Pierre
John Wiley & Sons, 1987
Buku Teks