Bunker, Robert, 1918-
Rutger?s University Press, 1959
Buku Teks
Hocking, John G.
Addison-Wesley, 1962
Buku Teks
Anderson, John G.
Industrial Press, 1983
Buku Teks
Hutchinson, John G.
Holt, Rinehart and Winston, 1967
Buku Teks
McEntyre, John G.
John Wiley & Sons, 1978
Buku Teks