Cita APA

(1972). 1972 yearbook covering the year 1971. New York: Crowell-Collier.

Citación estilo Chicago

1972 Yearbook Covering the Year 1971. New York: Crowell-Collier, 1972.

Cita MLA

1972 Yearbook Covering the Year 1971. New York: Crowell-Collier, 1972.

Precaución: Estas citas no son 100% exactas.