Tee Gee. (2008). Art of sudoku #2: Solving the ultimate puzzle. Twin Tree Pub.
Chicago Style (17th ed.) CitationTee Gee. Art of Sudoku #2: Solving the Ultimate Puzzle. Petaling Jaya: Twin Tree Pub, 2008.
MLA (8th ed.) CitationTee Gee. Art of Sudoku #2: Solving the Ultimate Puzzle. Twin Tree Pub, 2008.
Warning: These citations may not always be 100% accurate.