Orr, A. D. (2004). Advanced project management: A complete guide to the processes, models and techniques. Kogan Page.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOrr, Alan D. Advanced Project Management: A Complete Guide to the Processes, Models and Techniques. London ; Sterling, VA: Kogan Page, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOrr, Alan D. Advanced Project Management: A Complete Guide to the Processes, Models and Techniques. Kogan Page, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.