Cita APA (7th ed.)

Long, K. E. (1987). Introduction to Economics. Van Nostrand Reinhold.

Cita Chicago (17th ed.)

Long, Kenneth E. Introduction to Economics. New York: Van Nostrand Reinhold, 1987.

Cita MLA (9th ed.)

Long, Kenneth E. Introduction to Economics. Van Nostrand Reinhold, 1987.