Waud, R. N., & Norton, H. S. (1983). Economics (2nd ed.). Harper & Row.
Lua i Stíl Chicago (17ú heag.)Waud, Roger N., agus Hugh Stanton Norton. Economics. 2nd ed. New York: Harper & Row, 1983.
Lua MLA (9ú heag.)Waud, Roger N., agus Hugh Stanton Norton. Economics. 2nd ed. Harper & Row, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.