edited by Ilona Burchroth, Chris Parkin
Learning Matters, 2010
Buku Teks
Thomlison, Barbara, author
Brooks/Cole Thomson Learning, 2002
Buku Teks
Fellin, Phillip, author
Thomson, 2001
Buku Teks
Demkin, Joseph A., editor
John Wiley & Sons, 2001
Buku Referensi
Loewenberg, Frank M.
F E Peacock, 1972
Buku Teks