Cita APA (7th ed.)

(1991). Today´s best nonfiction. The Reader´s Digest.

Cita Chicago (17th ed.)

Today´s Best Nonfiction. New York, Estados Unidos: The Reader´s Digest, 1991.

Cita MLA (9th ed.)

Today´s Best Nonfiction. The Reader´s Digest, 1991.