एपीए उद्धरण

Cowley, M. . .. (1974). Twentieth century. Light & Life publishers.

शिकागो स्टाइल उद्धरण

Cowley, Malcolm,Ed. Twentieth Century. New Delhi: Light & Life publishers, 1974.

एमएलए उद्धरण

Cowley, Malcolm,Ed. Twentieth Century. Light & Life publishers, 1974.