Jerzy Krupinski, Alan Stoller
Pergamon Press, 1980
Buku Teks
edited by, Jerzy Krupinski and Alan Stoller
Pergamon Press, 1980
Buku Teks
Goode, William J.
Prentice-Hall, 1964
Buku Teks
Thomlison, Barbara, author
Brooks/Cole Thomson Learning, 2002
Buku Teks
Penguin Education, 1973
Buku Teks