edited by Jeremy Atkinson
Chandos Publishing, 2018
Buku Teks
Oxford University Press, 1979
Buku Teks
Malecki, Edward J., author
Longman Scientific & Technical, 1991
Buku Teks
edited by Anne Hellum, Henriette Sinding Aasen
Cambridge University Press, 2013
Buku Teks
Jayawickrama, Nihal, author
Cambridge University Press, 2017
eBooks