एपीए उद्धरण

(2013). WORLD BOOK OF ENCYCLOPAEDIA VOL.XXI -W-X-Y-Z. WorLD BOOK, CHICAGO.

शिकागो स्टाइल उद्धरण

WORLD BOOK OF ENCYCLOPAEDIA VOL.XXI -W-X-Y-Z. UNITED STATES: WorLD BOOK, CHICAGO, 2013.

एमएलए उद्धरण

WORLD BOOK OF ENCYCLOPAEDIA VOL.XXI -W-X-Y-Z. WorLD BOOK, CHICAGO, 2013.