Krugman, P. R. (1994). International economics: Theory and policy. New York: HarperCollins College Publishers.
Trích dẫn kiểu ChicagoKrugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.
MLA引文Krugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.
警告:這些引文格式不一定是100%准確.