Bryett, Keith, author
Butterworth, 1994
Buku Teks
Bryett, Keith, author
Butterworth, 1993
Buku Teks
Keith Bryett [and others]
Batterworths, 1993
Buku Teks
Ian K. Pepper, editor
Learning Matters, 2011
Buku Teks
Lundman, Richard J., author
Holty,Rinchart and Winston, 1980
Buku Teks