APA aipamena

(1971). Nature / Science annual (1971 ed.). New York: Time-life books.

Chicago Style aipamena

Nature / Science Annual. 1971 ed. New York: Time-life books, 1971.

MLA aipamena

Nature / Science Annual. 1971 ed. New York: Time-life books, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.