edited by Susan J. Bunting
McGraw-Hill, 2003
Buku Teks
Kelly, Gery F.
McGraw-Hill, Higher Education, 2008
Buku Teks
Mahoney, E.R.
McGraw-Hill, 1983
Buku Teks
New York and London, 1994
Buku Teks
Cameron, Deborah
Cambridge University Press, 2004
Buku Teks