Cita APA (7th ed.)
Helm, D., & Jenkinson, T. (1998). Competition in regulated industries. Oxford University Press.
Cita Chicago (17th ed.)
Helm, Dieter, i Tim Jenkinson. Competition in Regulated Industries. Oxford ; New York: Oxford University Press, 1998.
Cita MLA (9th ed.)
Helm, Dieter, i Tim Jenkinson. Competition in Regulated Industries. Oxford University Press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.