Philips, J. (2018). PMP Project Management Professional: Study Guide (fifth.). Mc Graw Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilips, John. PMP Project Management Professional: Study Guide. fifth. New York: Mc Graw Hill, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilips, John. PMP Project Management Professional: Study Guide. fifth. Mc Graw Hill, 2018.