Cita APA (7th ed.)

Watson, J. L. (1988). Symmetrical English 1 ... c5. Macmillan.

Cita Chicago (17th ed.)

Watson, John L. Symmetrical English 1 ... C5. New York: Macmillan, 1988.

Cita MLA (9th ed.)

Watson, John L. Symmetrical English 1 ... C5. Macmillan, 1988.