APA (7th ed.) Citation

Waud, R. N. (1989). Economics (4. ed.). Harper & Row.

Chicago Style (17th ed.) Citation

Waud, Roger N. Economics. 4. ed. New York, NY [u.a.]: Harper & Row, 1989.

MLA (9th ed.) Citation

Waud, Roger N. Economics. 4. ed. Harper & Row, 1989.