Παραπομπή APA
Stilwell, J. A., Lipsey, R. G., & Clarke, R. (1979). Workbook: To accompany the fifth edition of An Introduction to Positive Economic. London: Weidenfeld and Nicolson.
Παραπομπή Chicago StyleStilwell, J. A., Richard G. Lipsey, and Rosemary Clarke. Workbook: To Accompany the Fifth Edition of An Introduction to Positive Economic. London: Weidenfeld and Nicolson, 1979.
Παραπομπή MLAStilwell, J. A., Richard G. Lipsey, and Rosemary Clarke. Workbook: To Accompany the Fifth Edition of An Introduction to Positive Economic. London: Weidenfeld and Nicolson, 1979.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.