Barnes, A. James, author
Learning Systems, 1981
Buku Teks
edited by Mark Howard, Roger Masefield ; assistant editor, Jason Chuah
Nexis Butterworths, 2006
Buku Teks
Benjamin, Jane, author
Fourmat Publishing, 1993
Buku Teks
edited by Richard Haigh, Dai Harris
Routledge, 1994
Buku Teks
general editor Michael Renshall
Butterworth, 1990
Buku Referensi