APA (7th ed.) Citation

Gaffney, M. (2006). The pocket idiot's guide to: Extreme sudoku. Alpha Books Publishers.

Chicago Style (17th ed.) Citation

Gaffney, Matt. The Pocket Idiot's Guide to: Extreme Sudoku. New York: Alpha Books Publishers, 2006.

MLA (9th ed.) Citation

Gaffney, Matt. The Pocket Idiot's Guide to: Extreme Sudoku. Alpha Books Publishers, 2006.

Warning: These citations may not always be 100% accurate.