Sally Burt, Daniel Añorve Añorve
Palgrave Macmillan, 2016
Buku Teks
Joy Hakim, author
Oxford University Press, 2003
Buku Teks
Boller, Paul F., compiler
Houghton Mifflin , 1988
Buku Teks
Boller, Paul F., compiler
Hougton Mifflin, 1988
Buku Teks
Dorodjatun Kuntjoro-Jakti, author
University of Indonesia, 2005
Buku Teks