Cita APA (7th ed.)

HENDERSON, J. V., POOLE, W., & PARISH, A. E. (1991). Student workbook for principles of economics. D.C. Heath and Company.

Cita Chicago (17th ed.)

HENDERSON, J. Vernon, William POOLE, i Albert E. PARISH. Student Workbook for Principles of Economics. Lexington: D.C. Heath and Company, 1991.

Cita MLA (9th ed.)

HENDERSON, J. Vernon, et al. Student Workbook for Principles of Economics. D.C. Heath and Company, 1991.