Contest problems of world sudoku championships

Ngā taipitopito rārangi puna kōrero
Ētahi atu kaituhi:	Chua, Simon L.
Hōputu:	Pukapuka
Reo:	Ingarihi
I whakaputaina:	Pasig City Anvil Pub. c2009.
Ngā marau:	Sudoku > Philippines. Mathematical recreations > Philippines. Puzzles.