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