एपीए उद्धरण

Drucker, P. F. (1980). Managing in turbulent times. London: Heinemann.

शिकागो स्टाइल उद्धरण

Drucker, Peter F. Managing in Turbulent Times. London: Heinemann, 1980.

एमएलए उद्धरण

Drucker, Peter F. Managing in Turbulent Times. London: Heinemann, 1980.