Cita APA (7a ed.)

Ayres, L. P. (1940). Turning points in business cycles. Macmillan Company.

Cita Chicago Style (17a ed.)

Ayres, Leonard P. Turning Points in Business Cycles. New York: Macmillan Company, 1940.

Cita MLA (9a ed.)

Ayres, Leonard P. Turning Points in Business Cycles. Macmillan Company, 1940.