Wells, Walter
Kent Publishing Company, 1985
Buku Teks
Macleride, Sean
Balai Pustaka, 1983
Buku Teks
Haynes, W. Warren (William Warren), 1921-1972
PRENTOCE-HALL, Inc, Englewood Clifts, 1969
Buku Teks
Fitagerald, Hiram E
0, 1982
Buku Teks
Westview Press, 1991
Buku Teks