HENDERSON, J. V., POOLE, W., & PARISH, A. E. (1991). Student workbook for principles of economics. D.C. Heath and Company.
Chicago Style (17. basım) AtıfHENDERSON, J. Vernon, William POOLE, ve Albert E. PARISH. Student Workbook for Principles of Economics. Lexington: D.C. Heath and Company, 1991.
MLA (9th ed.) AtıfHENDERSON, J. Vernon, et al. Student Workbook for Principles of Economics. D.C. Heath and Company, 1991.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..