Poole, Peter A.
Cornell University Press, 1970
Buku Teks
Dhea Maharani
Universitas Indonesia, 2017
UI - Skripsi (Membership)
Higgins, Hugh
Heinemann Educational, 1975
Buku Teks
Foreign Languages Pub. House, 1959
Buku Teks
Hung, Yu-chiao
World Anti-Communist League, China Chapter, 1985
Buku Teks