Sinclair, Ian R.
Butterworth, 1981
Buku Teks
Winterowd, W. Ross
Harcourt Brace Jovanovich, 1981
Buku Teks
Hext, Valda, author
Allen & Unwin , 2003
Buku Teks
Riordan, Jan, author
Mosby, 1983
Buku Teks
Smerdon, Richard, author
Sweet and Maxwel, 2007
Buku Teks