APA aipamena

(1977). The Europa Yearbook 1977: A world survey.

Chicago Style aipamena

The Europa Yearbook 1977: A World Survey. London, Europa, 1977.

MLA aipamena

The Europa Yearbook 1977: A World Survey. 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.