Cita APA (7th ed.)

Waud, R. N. (1986). Economics (3rd ed.). Harper & Row.

Cita Chicago (17th ed.)

Waud, Roger N. Economics. 3rd ed. New York: Harper & Row, 1986.

Cita MLA (9th ed.)

Waud, Roger N. Economics. 3rd ed. Harper & Row, 1986.