Raz, Joseph, author
Oxford Univesity Press, 2009
Buku Teks
Raz, Joseph, author
Clarendon Press, 1979
Buku Teks
Fuller, Lon L., author
Yale University Press, 1974
Buku Teks
Fuller, Lon L., author
Yale University Press, 1964
Buku Teks
Spinello, Richard A., author
Jones and Bartlett Learning, 2017
Buku Teks