Universitas Indonesia, 1992
UI - Skripsi (Membership)
Budden, John
Longmans, Green and Co., 1951
Buku Teks
Rossabi, Morris, author
Wiley Balckwell, 2014
Buku Teks
Goldstein, Steven M., author
Polity Press, 2015
Buku Teks
Liu, James T.C.
Prentice-Hall, 1970
Buku Teks