Cook, Arthur N., author
Littlefield Adams, 1969
Buku Teks
Rooney, D.D., author
George G. Harrap, 1967
Buku Teks
Webster, J.B.
Praeger, 1967
Buku Teks
Dean, Vera Micheles
The New American Library, 1960
Buku Teks
Legu. Colin
Mc-Graw Hill, 1974
Buku Teks