Levin, O. (2016). Discrete mathematics: An open introduction (2nd edition.). [publisher not identified].
Cita Chicago (17th ed.)Levin, Oscar. Discrete Mathematics: An Open Introduction. 2nd edition. [Place of publication not identified]: [publisher not identified], 2016.
Cita MLA (9th ed.)Levin, Oscar. Discrete Mathematics: An Open Introduction. 2nd edition. [publisher not identified], 2016.
Atenció: Aquestes cites poden no estar 100% correctes.