Cita APA (7th ed.)

Brualdi, R. A. Introductory Combinatorics (4th.).

Cita Chicago (17th ed.)

Brualdi, Richard A. Introductory Combinatorics. 4th.

Cita MLA (9th ed.)

Brualdi, Richard A. Introductory Combinatorics. 4th.

Atenció: Aquestes cites poden no estar 100% correctes.