Agrawal, B. K., author
Tata McGraw-Hill , 1994
Buku Teks
Lakhtin, Y., author
Mir Publishers, 1977
Buku Teks
Macmillan Education, 1988
Buku Teks
Gaskell, David R.
Taylor and Francis, 2008
Multimedia
Gaskell, David R., author
Taylor & Francis Group, 2008
Buku Teks