Cita APA (7th ed.)

HAVENS, R. (1966). Economics: Principles of income, prices and. Macinillan.

Cita Chicago (17th ed.)

HAVENS, R. Economics: Principles of Income, Prices and. New York: Macinillan, 1966.

Cita MLA (9th ed.)

HAVENS, R. Economics: Principles of Income, Prices and. Macinillan, 1966.