APA (7th ed.) Citation

Bolyai, J., Kárteszi, F., & Szénássy, B. (1987). Appendix, the theory of space. North-Holland.

Chicago Style (17th ed.) Citation

Bolyai, János, Ferenc Kárteszi, and Barna Szénássy. Appendix, the Theory of Space. Amsterdam ; New York: North-Holland, 1987.

MLA (9th ed.) Citation

Bolyai, János, et al. Appendix, the Theory of Space. North-Holland, 1987.