APA aipamena

World book. (1996). World book encyclopedia(vol.22.): :research guide. World book international.

Chicago Style aipamena

World book. World Book Encyclopedia(vol.22.): :research Guide. London: World book international, 1996.

MLA aipamena

World book. World Book Encyclopedia(vol.22.): :research Guide. World book international, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.