Enrich Professional Pub., 2012
Buku Teks SO
Jahangir Aziz
S l. IMF 2002,
Buku Teks
Cole, David C.
Cambridge University Press, 1996
Buku Teks
Cambridge Harvard University Press 1962,
Buku Teks
Yongsheng, Zhao
China Renmin University Press, 2017
eBooks