Cita APA (7a ed.)

Helm, D., & Jenkinson, T. (1998). Competition in regulated industries. Oxford University Press.

Cita Chicago Style (17a ed.)

Helm, Dieter, y Tim Jenkinson. Competition in Regulated Industries. Oxford ; New York: Oxford University Press, 1998.

Cita MLA (9a ed.)

Helm, Dieter, y Tim Jenkinson. Competition in Regulated Industries. Oxford University Press, 1998.