Chartrand, G., Lesniak, L., & Zhang, P. (2011). Graphs & digraphs (Fifth edition.). Chapman and Hall/CRC.
Lua i Stíl Chicago (17ú heag.)Chartrand, Gary, Linda Lesniak, agus Ping Zhang. Graphs & Digraphs. Fifth edition. Boca Raton, FL: Chapman and Hall/CRC, 2011.
Lua MLA (9ú heag.)Chartrand, Gary, et al. Graphs & Digraphs. Fifth edition. Chapman and Hall/CRC, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.