Posner, Richard A., author
The University of Chicago, 1976
Buku Teks
edited by Sylvester E. Berki
Health, 1966
Buku Teks
edited by Werner Sichel
Ann Arbor, 1970
Buku Teks
Elzinga, Kenneth G., author
Yale University Press, 1976
Buku Teks
edited by Theodore P. Kovaleff
M.E. Sharpe, 1994
Buku Teks