Buttrick, R. (1997). The project workout: A tool kit for reaping the rewards from all your business projects. Pitman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रButtrick, Robert. The Project Workout: A Tool Kit for Reaping the Rewards from All Your Business Projects. London: Pitman, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रButtrick, Robert. The Project Workout: A Tool Kit for Reaping the Rewards from All Your Business Projects. Pitman, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.