Craig, Robert T., author
Prentice-Hall, 1969
Buku Teks
Russell, Bertrand, 1872-1970, author
George Allen and Unwin, 1956
Buku Teks
Smith, Karl J., author
Brooks/Cole, 1973
Buku Teks
Hafstrom, John E., author
Addison-Wesely, 1961
Buku Teks
Sharp, Henry, author
Prentice-Hall, 1968
Buku Teks