Gould, W. (2005). Grand master sudoku 2. HarperCollins Publishers.
Lua i Stíl Chicago (17ú heag.)Gould, Wayne. Grand Master Sudoku 2. New York: HarperCollins Publishers, 2005.
Lua MLA (9ú heag.)Gould, Wayne. Grand Master Sudoku 2. HarperCollins Publishers, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.