Cita APA (7th ed.)

Chartrand, G., & Lesniak, L. (2005). Graphs & digraphs (4th ed.). Chapman & Hall/CRC.

Cita Chicago (17th ed.)

Chartrand, Gary, i Linda Lesniak. Graphs & Digraphs. 4th ed. Boca Raton: Chapman & Hall/CRC, 2005.

Cita MLA (9th ed.)

Chartrand, Gary, i Linda Lesniak. Graphs & Digraphs. 4th ed. Chapman & Hall/CRC, 2005.