APA (7th ed.) Citation

Borovik, A., & Gardiner, T. (2019). The Essence of Mathematics Through Elementary Problems. Open Book Publishers.

Chicago Style (17th ed.) Citation

Borovik, Alexandre, and Tony Gardiner. The Essence of Mathematics Through Elementary Problems. [Place of publication not identified]: Open Book Publishers, 2019.

MLA (9th ed.) Citation

Borovik, Alexandre, and Tony Gardiner. The Essence of Mathematics Through Elementary Problems. Open Book Publishers, 2019.