Cita APA (7th ed.)
Mcconnell,Campbell R. Economics: Principles, problems and policies. McGraw-Hill.
Cita Chicago (17th ed.)
Mcconnell,Campbell R. Economics: Principles, Problems and Policies. New York: McGraw-Hill.
Cita MLA (9th ed.)
Mcconnell,Campbell R. Economics: Principles, Problems and Policies. McGraw-Hill.
Atenció: Aquestes cites poden no estar 100% correctes.