London, Oxford University Press
Buku Referensi
Oxford University Press, 2004
Buku Teks
edited by Daniel Bodansky, Jutta Brunnee and Ellen Hey
University of Oxford Press, 2008
Buku Teks
Donoghue, Emma, 1969-, author
Picador, 2015
Buku Teks
Boyden, David D., author
Alfred A. Knopf , 1956
Buku Teks