Armstrong, Michael, author
Crest Publishing House, 1999
Buku Teks
Armstrong, Michael, author
Gramedia, 2003
Buku Teks
McSweeney, Edward, author
Pustaka Binaman Pressindo, 1985
Buku Teks
Andrews, jean, author
Course Technology, 2013
Buku Teks
Armstrong, Michael, author
[Publisher not identified], [Date of publication not identified]
Buku Teks