Gaya APA

Samuelson, P, A., Nordhaus, W, D. (1992). Macroeconomics (Ed. 4). Newyork: McGraw-Hill.

Gaya MLA

Samuelson, Paul, A., Nordhaus, William, D. "Macroeconomics". Ed. 4 Newyork: McGraw-Hill, 1992. Text.