APA (7th ed.) Citation

Bolyai Janos Matematikai Tarsulat, Gyory, K., & Halasz, G. (1990). Number theory. North-Holland.

Chicago Style (17th ed.) Citation

Bolyai Janos Matematikai Tarsulat, Kalman Gyory, and Gabor Halasz. Number Theory. Amsterdam: North-Holland, 1990.

MLA (9th ed.) Citation

Bolyai Janos Matematikai Tarsulat, et al. Number Theory. North-Holland, 1990.