APA (7th ed.) Zitazioa
(1948). An encyclopedia of world history: Ancient, medieval, and modern, chronologically arranged (ed.). Houghton Mifflin co..
Chicago Style (17th ed.) Zitazioa
An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologically Arranged. ed. Boston: Houghton Mifflin co., 1948.
MLA (9th ed.) Zitazioa
An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologically Arranged. ed. Houghton Mifflin co., 1948.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.