एपीए उद्धरण

Maddison, A. (1989). The world economy in the 20th century. Paris: Development Centre of the Organisation for Economic Co-operation and Development.

शिकागो स्टाइल उद्धरण

Maddison, Angus. The World Economy in the 20th Century. Paris: Development Centre of the Organisation for Economic Co-operation and Development, 1989.

एमएलए उद्धरण

Maddison, Angus. The World Economy in the 20th Century. Paris: Development Centre of the Organisation for Economic Co-operation and Development, 1989.