APA aipamena

Sarah Janssen. (2008). The WORLD almanac and book of facts 2008. World Almanac Books.

Chicago Style aipamena

Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.

MLA aipamena

Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.