Peter Suwarno
Gadjah Mada University Press, 1999
Buku Referensi
Gray, Loretta S.
National Textbook Company, 1999
Buku Teks SO
Whitford, Harold C.
Regents Publishing, 1973
Buku Teks
Huang, Yen-Kai
China, [date of publication not identified]
Buku Referensi
Shaw, Harry
McGraw-Hill, 1975
Buku Referensi