APA (7th ed.) Citation

Nunn, J., & Mercer, S. D. (2019). Chess tactics workbook for kids. Gambit.

Chicago Style (17th ed.) Citation

Nunn, John, and Shane D. Mercer. Chess Tactics Workbook for Kids. London, England: Gambit, 2019.

MLA (8th ed.) Citation

Nunn, John, and Shane D. Mercer. Chess Tactics Workbook for Kids. Gambit, 2019.

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