Berg, S. V. (1989). Natural monopoly regulation principles and practice. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Berg, Sanford V. Natural Monopoly Regulation Principles and Practice. Cambridge University Press, 1989.
Lua MLA (8ú heag.)Berg, Sanford V. Natural Monopoly Regulation Principles and Practice. Cambridge University Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.