Cita APA (7th ed.)

Brualdi, R. A. (1977). Introductory combinatorics. North-Holland.

Cita Chicago (17th ed.)

Brualdi, Richard. A. Introductory Combinatorics. New York: North-Holland, 1977.

Cita MLA (9th ed.)

Brualdi, Richard. A. Introductory Combinatorics. North-Holland, 1977.