Wolf, Hans M
California University of California Press 1952
Buku Teks
Vestdijk, S.
De Bezige Bij, 1958
Buku Teks
Richard Creath, editor
Springer, 2012
eBooks
Kronstein, Heinrich
Cornell University Press, 1973
Buku Teks
Keller, Gottfried
Atlantis Verlag AG, 1965
Buku Teks