APA (7th ed.) Citation

Holton, D. A. (2011). A second step to mathematical olympiad problems. World Scientific.

Chicago Style (17th ed.) Citation

Holton, Derek Allan. A Second Step to Mathematical Olympiad Problems. Hackensack, NJ [u.a.]: World Scientific, 2011.

MLA (9th ed.) Citation

Holton, Derek Allan. A Second Step to Mathematical Olympiad Problems. World Scientific, 2011.

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