Stevens & Sond Limited, 1959
Buku Teks
by Robert Cryer ... [and others]
Cambridge University Press, 2010
Buku Teks
Carsten Stahn, editor
Oxford Univesity Press, 2015
Buku Teks
Hemptinne, Jérôme de, author
Cambridge University Press, 2019
eBooks
by Robert Cryer ... [and others]
Cambridge University Press, 2016
Buku Teks