APA (7th ed.) Citation

Longo, F. (2006). The Big book of wordoku puzzles. Sterling Publishing Co., Inc.

Chicago Style (17th ed.) Citation

Longo, Frank. The Big Book of Wordoku Puzzles. New York: Sterling Publishing Co., Inc, 2006.

MLA (9th ed.) Citation

Longo, Frank. The Big Book of Wordoku Puzzles. Sterling Publishing Co., Inc, 2006.

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