Cita APA (7th ed.)

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.