Nadeak, Carry
Java Media Indo Plus, 2003
Buku Teks
Acton, Edward
Longman, 1986
Buku Teks
edited by Stephanie Abraham Hirsh and Philip Bacon
Harcourt Brace Jovanovich, 1988
Buku Teks
Wallbank, T. Walter
Scott, Foresman, 1965
Buku Teks
Reischauer, Edwin O.
Alfred A. Knopf, 1964
Buku Teks