Edwards, Anne, author
Longman, 1996
Buku Teks
edited by Norman A. Polansky
University of Chicago Press, 1975
Buku Teks
editor, Bruce A. Thyer
Sage Publications, 2001
Buku Referensi
edited by Norman A. Polansky
University of Chicago Press, 1962
Buku Teks
Alston, Margaret, author
Allen & Unwin, 1998
Buku Teks