edited by Theodore P. Kovaleff
M.E. Sharpe, 1994
Buku Teks
Calvani, Terry, author
Little, Brown, 1988
Buku Teks
Bowman, Ward S., Jr., author
University of Chicago Press, 1973
Buku Teks
Posner, Richard A., author
The University of Chicago, 1976
Buku Teks
edited by Werner Sichel
Ann Arbor, 1970
Buku Teks