APA
Monckton C., . (2005). Sudoku X. : Headline Publishing Group.
Chicago
Monckton Christopher, . 2005. Sudoku X. : Headline Publishing Group.
Harvard
Monckton C., . (2005). Sudoku X. : Headline Publishing Group.
MLA
Monckton Christopher, . Sudoku X. : Headline Publishing Group. 2005.