Παραπομπή APA

Holton, D. (2011). Second step to mathematical olympiad problems. World Scientific Publishing.

Παραπομπή Chicago Style

Holton, Derek. Second Step to Mathematical Olympiad Problems. Singapore: World Scientific Publishing, 2011.

Παραπομπή MLA

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