Hart, H.L.A.
Standford University Press, 1969
Buku Teks
Fuller, Lon L.
Yale University Press, 1974
Buku Teks
Fuller, Lon L.
Yale University Press, 1964
Buku Teks
Bello, Petrus C.K.L.
Erlangga, 2012
Buku Teks
Mitchell, Basil
Oxford University Press, 1970
Buku Teks