Petitte, R. D. (2013). Civilization at risk: Seeds of strife. Cambridge Scholars Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPetitte, Ron D. Civilization at Risk: Seeds of Strife. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPetitte, Ron D. Civilization at Risk: Seeds of Strife. Cambridge Scholars Publishing, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.