Cita APA (7a ed.)

Train, K. (1991). Optimal regulation: The economic theory of natural monopoly. MIT Press.

Cita Chicago Style (17a ed.)

Train, Kenneth. Optimal Regulation: The Economic Theory of Natural Monopoly. Cambridge, Mass.: MIT Press, 1991.

Cita MLA (8a ed.)

Train, Kenneth. Optimal Regulation: The Economic Theory of Natural Monopoly. MIT Press, 1991.