Hill, Maiji
Australian Institute of Aboriginal Studies, 1978
Buku Referensi
edited by L. Pamela Cook
Society for Industrial and Applied Mathematics, 1993
eBooks
Haley, Alex
Pan Books, 1976
Buku Teks
Buzo, Alex
Angus and Roberson Publishers, 1975
Buku Teks
Dawson, Steve, author
Marshall Cavendish Edition, 2010
Buku Teks