Hart, James
Oxford University Press, 1965
Buku Referensi
edited by Yogita Goyal
Cambridge University Press, 2017
Buku Teks
Hart, James D.
Oxford University Press, 1986
Buku Referensi
Hart, James
Oxford University Press, 1948
Buku Teks
edited by John Morán González
Cambridge University Press, 2016
Buku Teks