Blaise, Clark
General Publishing, 1974
Buku Teks
Corry, Stephen
Freeman Press, 2011
Buku Teks
Rosile, Grace Ann
Emerald, 2016
eBooks
Doren, Charles van
Frederick A. Praeger , 1967
Buku Teks
Daniel, Glyn
Victoria: Penguin Books Australia, 1962
Buku Teks