APA Edition Citation

Andreescu, T., Dospinescu, G., & Mushkarov, O. (2017). Number theory: Concepts and problems. XYZ Press.

Chicago Edition Citation

Andreescu, Titu, Gabriel Dospinescu, and Oleg Mushkarov. Number Theory: Concepts and Problems. USA: XYZ Press, 2017.

MLA Edition Citation

Andreescu, Titu, et al. Number Theory: Concepts and Problems. XYZ Press, 2017.