Beatty, Ken, author
Pearson Education, 2003
Buku Teks
Falmer Press, 1999
Buku Teks
edited by Raven I. Mcdavid and Audrey R. Duckert
Foresman and Company,
Buku Teks
Jackson, Howard, 1945-, author
Routledge , 2002
Buku Teks
edited by Robert F. Ilson
Philadephia John Benjamin Publishing, 1987
Buku Teks