edited by Sylvester E. Berki
Health, 1966
Buku Teks
edited by Werner Sichel
Ann Arbor, 1970
Buku Teks
Hovenkamp, Herbert
West Publishing, 1993
Buku Teks
Stelzer, Irwin M.
Richard D. Irwin, Inc., 1976
Buku Teks
Posner, Richard A.
The University of Chicago, 1976
Buku Teks