edited by Paula Geyh
Cambridge University Press, 2017
Buku Teks
Hart, James, author
Oxford University Press, 1965
Buku Referensi
edited by Deirdre Osborne
Cambridge University Press, 2016
Buku Teks
Nicolas S. Witschi, editor
Wiley Balckwell, 2014
Buku Teks
Hart, James D., author
Oxford University Press, 1986
Buku Referensi