Friedmann, Wolfgang, 1907-1972, author
Columbia University Press, 1960
Buku Teks
Tannsjo, Torbjorn, author
Edinburgh University Press, 2010
Buku Teks
edited by Ken Ehrlich and Brandon Labelle
Errant Bodies Press, 2003
Buku Teks
Kamm, F.M.
Oxford University Press, 1992
Buku Teks
Kelsen, Hans, author
Alumni, 1982
Buku Teks