Keyssar, Helene
Macmillan Press , 1972
Buku Teks
Griffin, Gabriele, author
Cambridge University Press, 2003
Buku Teks
Weales, Gerald Clifford, 1925-, author
Macmillan, 1969
Buku Teks
edited by Hersh Zeifman and Cynthia Zimmerman
Macmillan, 1993
Buku Teks
Wandor, Michelene, author
Longman, 1993
Buku Teks