Cita APA (7th ed.)
Keys, P. Understanding the Process of Operational Research: Collected Readings. Wiley.
Cita Chicago (17th ed.)
Keys, Paul. Understanding the Process of Operational Research: Collected Readings. Chichester, Inglaterra: Wiley.
Cita MLA (9th ed.)
Keys, Paul. Understanding the Process of Operational Research: Collected Readings. Wiley.
Atenció: Aquestes cites poden no estar 100% correctes.