Irma Taavitsainen, Paivi Pahta, editor
Cambridge University Press, 2011
Buku Teks SO
Cambridge University Press, 2010
eBooks
Cambridge University Press, 1996
eBooks
Wilcox, Helen
John Wiley & Sons Inc,, 2014
Buku Teks SO
Edited by Sophie Chiari
Routledge, 2015
Buku Teks SO