Gaya APA

SAMUELSON, P, A., NORDHAUS, W, D. (1989). Macroeconomics . United States of America: MCGRAW-HILL BOOK COMPANY.

Gaya MLA

SAMUELSON, PAUL, A.., NORDHAUS, WILLIAM, D.. "Macroeconomics". United States of America: MCGRAW-HILL BOOK COMPANY, 1989. Text.