APA (7th ed.) Citation

Xu, J. Lecture notes on mathematical Olympiad courses: For junior section. World Scientific.

Chicago Style (17th ed.) Citation

Xu, Jiagu. Lecture Notes on Mathematical Olympiad Courses: For Junior Section. Singapore [u.a.]: World Scientific.

MLA (9th ed.) Citation

Xu, Jiagu. Lecture Notes on Mathematical Olympiad Courses: For Junior Section. World Scientific.

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