Schaaf, William L.
Wiley-Academy, 1965
Buku Teks
Peterson, John M.
Prindle, Weber & Schmidt Inc, 1971
Buku Teks
Schaaf, William L.
Collier Books, 1966
Buku Teks
Hafstrom, John E., author
Addison-Wesely, 1961
Buku Teks
Juszli, Frank L.
Prentice-Hall, 1969
Buku Teks