Cita APA (7th ed.)

Gould, W. (2005). Grand master sudoku 2. HarperCollins Publishers.

Cita Chicago (17th ed.)

Gould, Wayne. Grand Master Sudoku 2. New York: HarperCollins Publishers, 2005.

Cita MLA (9th ed.)

Gould, Wayne. Grand Master Sudoku 2. HarperCollins Publishers, 2005.