Gaya APA

Frank, R, H., Bernanke, B, S. (2009). Principles of microeconomics (4 th Ed.). Boston: McGraw-Hill Irwin.

Gaya MLA

Frank, Robert, H.., Bernanke, Ben, S.. "Principles of microeconomics". 4 th Ed. Boston: McGraw-Hill Irwin, 2009. Text.