Wilmoth, James H., author
Prentice-Hall, 1967
Buku Teks
Barnes, Robert D., author
Saunders, 1969
Buku Teks
Woolley, Tyler A., author
Burgess, 1969
Buku Teks
Buchsbaum, Ralph
Chicago The University of Chicago Press, [date of publication not identified],
Buku Teks
edited by Arthur C. Giese, John S. Pearse and Vicki B. Pearse
Blackwell Scientific , 1987
Buku Teks