Lipsey, R. G., Harbury, C. D., Harbury, C. D. 1., & Harbury, C. (1992). First principles of economics (2nd ed.). London: Oxford University Press.
Παραπομπή Chicago StyleLipsey, Richard G., C. D. Harbury, C. D. 1922- Harbury, and Colin Harbury. First Principles of Economics. 2nd ed. London: Oxford University Press, 1992.
Παραπομπή MLALipsey, Richard G., C. D. Harbury, C. D. 1922- Harbury, and Colin Harbury. First Principles of Economics. 2nd ed. London: Oxford University Press, 1992.
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