Valenburg, M. V. (1974). Network analysis (3rd ed.). Prentice hall.
Lua i Stíl Chicago (17ú heag.)Valenburg, M.E. Van. Network Analysis. 3rd ed. Englewood cliffs, N.j. ; New Delhi: Prentice hall, 1974.
Lua MLA (8ú heag.)Valenburg, M.E. Van. Network Analysis. 3rd ed. Prentice hall, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.