Cita APA (7th ed.)

WISHON, G. E., & BURKS, J. M. (1980). Let's write english.-- Ed. Revised. American Book Co.

Cita Chicago (17th ed.)

WISHON, George E., i Julia M. BURKS. Let's Write English.-- Ed. Revised. New York: American Book Co, 1980.

Cita MLA (9th ed.)

WISHON, George E., i Julia M. BURKS. Let's Write English.-- Ed. Revised. American Book Co, 1980.