APA (7th ed.) Zitazioa

(1987). The World of learning 1987: The standard and authoritative guide to educational, scientific and cultural institutions all over the world (37th ed.). Europa.

Chicago Style (17th ed.) Zitazioa

The World of Learning 1987: The Standard and Authoritative Guide to Educational, Scientific and Cultural Institutions All over the World. 37th ed. London: Europa, 1987.

MLA (9th ed.) Zitazioa

The World of Learning 1987: The Standard and Authoritative Guide to Educational, Scientific and Cultural Institutions All over the World. 37th ed. Europa, 1987.