Nicolas S. Witschi, editor
Wiley Balckwell, 2014
Buku Teks SO
Hart, James, author
Oxford University Press, 1965
Buku Referensi
edited by Yogita Goyal
Cambridge University Press, 2017
Buku Teks
Hart, James D., author
Oxford University Press, 1986
Buku Referensi
edited by John Morán González
Cambridge University Press, 2016
Buku Teks