Ahearn, Laura M. author
John Wiley & Sons, Incorporated,, 2016
Buku Teks
Fabb, Nigel, author
Cambridge University Press, 2009
eBooks
Montgomery, Martin, author
Routledge, 2007
Buku Teks
Boelaars, J.H.M.C.
EJ Brill, 1950
Buku Teks
Verhagen, Arie, author
Foris Publications, 1986
Buku Teks