एपीए उद्धरण

Keen, J. S. (1981). Managing Systems Development. John Wiley.

शिकागो स्टाइल उद्धरण

Keen, Jeffrey S. Managing Systems Development. Chichester: John Wiley, 1981.

एमएलए उद्धरण

Keen, Jeffrey S. Managing Systems Development. John Wiley, 1981.