Ferguson,Nail. (2013). The Great Degeneration: How Institutions Decay and Economies Die. Penguin press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFerguson,Nail. The Great Degeneration: How Institutions Decay and Economies Die. New York: Penguin press, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFerguson,Nail. The Great Degeneration: How Institutions Decay and Economies Die. Penguin press, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.