Cita APA (7a ed.)
Harford, J. D. (1998). The ultimate externality. American Economic Review, 88(1), 260-266.
Cita Chicago Style (17a ed.)
Harford, Jon D. "The Ultimate Externality." American Economic Review 88, no. 1 (1998): 260-266.
Cita MLA (9a ed.)
Harford, Jon D. "The Ultimate Externality." American Economic Review, vol. 88, no. 1, 1998, pp. 260-266.
Precaución: Estas citas no son 100% exactas.