APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.