APA (7th ed.) Citation

Khesin, B., & Tabachnikov, S. (2019). Fun Problems in Geometry and Beyond. Symmetry, Integrability and Geometry: Methods and Applications.

Chicago Style (17th ed.) Citation

Khesin, B., and S. Tabachnikov. "Fun Problems in Geometry and Beyond." Symmetry, Integrability and Geometry: Methods and Applications 2019.

MLA (8th ed.) Citation

Khesin, B., and S. Tabachnikov. "Fun Problems in Geometry and Beyond." Symmetry, Integrability and Geometry: Methods and Applications, 2019.

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