Cita APA (7a ed.)

Ekelund, R. (1990). A history of economic theory and method (3rd.). Mc Graw Hill.

Cita Chicago Style (17a ed.)

Ekelund, R. A History of Economic Theory and Method. 3rd. New York: Mc Graw Hill, 1990.

Cita MLA (9a ed.)

Ekelund, R. A History of Economic Theory and Method. 3rd. Mc Graw Hill, 1990.