Departemen Pendidikan dan Kebudayaan, 1996
Buku Teks
edited by Marc-David L. Seidel, Henrich R. Greve
Emerald, 2017
eBooks
Heine, Bernd, author
Cambridge University Press, 2005
Buku Teks
Ullmann-Margalit, Edna
Clarendon Press, 1977
Buku Teks
Pfeiffer, John E., author
Harper & Row, 1969
Buku Teks