Mason, H.A.
Routledge and Kegan Paul, 1959
Buku Teks
Schrickx, Willem, author
De Nederlandse Boekhandel, 1956
Buku Teks
Matchinske, Megan, author
Cambridge University Press, 1998
eBooks
Cambridge University Press, 1997
Buku Teks
Irma Taavitsainen, Paivi Pahta, editor
Cambridge University Press, 2011
Buku Teks