Dinter, Heinz, author
Macmillan, 1973
Buku Teks
Sterling, T.D., author
Macmillan, 1970
Buku Teks
Rice, John K., author
Holt, Rinehart and Winston , 1973
Buku Teks
Nolan, Richard L., author
Addison-Wesley, 1971
Buku Teks
Hammond, Robert H., author
McGraw-Hill, 1983
Buku Teks