Gaya APA

Appleyard, D, R., Field, A, J, J. (2014). International Economics. Eight Edition (Ed.Ke-8). New York: McGraw-Hill Education.

Gaya MLA

Appleyard, Dennis, R.., Field, Alfred, J.,, Jr.. "International Economics. Eight Edition". Ed.Ke-8 New York: McGraw-Hill Education, 2014. Textbook.