APA aipamena

(1989). Press and advertisers yearbook 1989-90.

Chicago Style aipamena

Press and Advertisers Yearbook 1989-90. New Delhi, INFA Publications, 1989.

MLA aipamena

Press and Advertisers Yearbook 1989-90. 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.