Gerstenberg, Charles W., author
Prentice-Hall, 1918
Buku Teks
Hastings, Paul G., author
McGraw-Hill, 1974
Buku Teks
McGuire, Joseph W., author
McGraw-Hill, 1963
Buku Teks
Keith, Lyman A., author
McGraw-Hill, 1958
Buku Teks
Cornell, William B., author
Alexander Hamilton Institute, 1962
Buku Teks