Mikalachki, Jodi, author
Routledge, 1998
Buku Teks
edited by J. William Hebel and Hoyt H. Hudson
Appleton-Century-Crofts, 1929
Buku Teks
Bates, Chaterine, author
Cambridge University Press, 2009
eBooks
Schrickx, Willem, author
De Nederlandse Boekhandel, 1956
Buku Teks
Mason, H.A.
Routledge and Kegan Paul, 1959
Buku Teks