Douherty, James E., author
J.B. Lippincott, 1971
Buku Teks
Dougherty, James E., author
Longman, 1996
Buku Teks
Nicholson, Michael, author
Cambridge University Press, 1989
Buku Teks
Tim Dunne
Oxford University Press, 2010
Buku Teks
Edited by Tim Dunne, Milja Kurki, Steve Smith
Oxford University Press, 2016
Buku Teks