Παραπομπή σε μορφή APA (7η εκδ.)

Keys, P. (1995). Understanding the process of operational research: Collected readings. John Wiley & Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Keys, Paul. Understanding the Process of Operational Research: Collected Readings. Chichester: John Wiley & Sons, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

Keys, Paul. Understanding the Process of Operational Research: Collected Readings. John Wiley & Sons, 1995.