Cohen, Norman H., author
McGraw-Hill, 1986
Buku Teks
Johnson, Philip I., author
McGraw-Hill, 1985
Buku Teks
Cook, Vivian, author
ARNOLD, 2001
Buku Teks
The Hankes Foundation, 1992
Multimedia
Saville-Troike, Muriel, 1936-, author
Cambridge University Press , 2006
Buku Teks