Cita APA (7th ed.)

Gardner, B. S. (1984). Economics: Study guide. Houghton Mifflin.

Cita Chicago (17th ed.)

Gardner, Bronfenbrenner Sichel. Economics: Study Guide. Boston: Houghton Mifflin, 1984.

Cita MLA (9th ed.)

Gardner, Bronfenbrenner Sichel. Economics: Study Guide. Houghton Mifflin, 1984.