Cita APA (7a ed.)

Lipsey, R. G., & Harbury, C. (1992). First principles of economics. Weidenfeld & Nicolson.

Cita Chicago Style (17a ed.)

Lipsey, Richard G., y Colin Harbury. First Principles of Economics. London: Weidenfeld & Nicolson, 1992.

Cita MLA (9a ed.)

Lipsey, Richard G., y Colin Harbury. First Principles of Economics. Weidenfeld & Nicolson, 1992.