Baker, Ann, author
Cambridge University Press, 1982
Buku Teks
Smith, Jennifer, author
Macmillan, 1982
Buku Teks
edited by Michael Swan and Bernard Smith
Cambridge University Press, 1987
Buku Teks
Jesness, Jerry, author
Corwin Press, 2004
Buku Teks
Radlauer, Ruth, author
Bowmar, 1971
Buku Teks