Bamberg, Paul, author
University of Cambridge, 1995
Buku Teks
Muhamad Mat Salleh, author
Dewan Pustaka dan Bahasa Kementerian Pendidikan Malaysia, 1990
Buku Teks
Cornwell, J.F., author
Academic Press, 1984
Buku Teks
Houston, William V.
Buku Teks
Fletcher, Glenn, author
Wm. C. Brown, 1994
Buku Teks