Cita APA (7th ed.)
Byrns, R. T., & Stone, G. W. (1992). Economics (5th ed.). HarperCollins College Pub..
Cita Chicago (17th ed.)
Byrns, Ralph T., i Gerald W. Stone. Economics. 5th ed. New York: HarperCollins College Pub., 1992.
Cita MLA (9th ed.)
Byrns, Ralph T., i Gerald W. Stone. Economics. 5th ed. HarperCollins College Pub., 1992.
Atenció: Aquestes cites poden no estar 100% correctes.