एपीए उद्धरण

(1999). World of Learning 2000 (50th ed.). Europa Publications.

शिकागो स्टाइल उद्धरण

World of Learning 2000. 50th ed. London: Europa Publications, 1999.

एमएलए उद्धरण

World of Learning 2000. 50th ed. Europa Publications, 1999.