Cita APA (7a ed.)

Boucke, O. F. Principles of economics / by O. Fred Boucke professor of economics at Pensylvania State College.

Cita Chicago Style (17a ed.)

Boucke, Oswald Fred. Principles of Economics / by O. Fred Boucke Professor of Economics at Pensylvania State College. New York : The Macmillan company, 1925.

Cita MLA (8a ed.)

Boucke, Oswald Fred. Principles of Economics / by O. Fred Boucke Professor of Economics at Pensylvania State College.