APA Style

KRUGMAN, P, R., OBSTFELD, M. (2000). International Economics : Theory and Policy, 5th Ed. (5). Massachusetts: G.K. Hall & CO.

MLA Style

KRUGMAN, PAUL, R.., OBSTFELD, MAURICE. "International Economics : Theory and Policy, 5th Ed.". 5 Massachusetts: G.K. Hall & CO, 2000. Text.