एपीए उद्धरण

Urwick, L. (1958). Leadership in the twentieth century. Sir Isaac Pitman.

शिकागो स्टाइल उद्धरण

Urwick, L.F. Leadership in the Twentieth Century. London: Sir Isaac Pitman, 1958.

एमएलए उद्धरण

Urwick, L.F. Leadership in the Twentieth Century. Sir Isaac Pitman, 1958.