edited by Brian R. Pamplin
Pergamon Press , 1981
Buku Teks
Conway, Jill Ker
Wiliam Heinemann Australia, 1989
Buku Teks
Roe, Jill
New South Wales University Press, 1986
Buku Teks
Entwistle, Jill, author
New York Roto vision SA 1999,
Buku Referensi
Rosenwasser, David
Fort Worth Harcourt Brace College 1997,
Buku Referensi