Office of the Secretary of State for Information and Tourism, [date of publication not identified]
Buku Teks
Paramita R. Abdurachman, author
Yayasan Obor Indonesia, 2008
Buku Teks
Disney, A.R, author
Cambridge University Press, 2009
Buku Teks
Livermore, H.V., author
Cambridge University Press, 1969
Buku Teks
Birmingham, David, author
Cambridge University Press, 1993
Buku Teks