APA (7th ed.) Citation

Holton, D. A. (2010). A first step to Mathematical Olympiad problems. World Scientific.

Chicago Style (17th ed.) Citation

Holton, Derek Allan. A First Step to Mathematical Olympiad Problems. Hackensack, NJ: World Scientific, 2010.

MLA (9th ed.) Citation

Holton, Derek Allan. A First Step to Mathematical Olympiad Problems. World Scientific, 2010.

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