Thomas, D. (1994). How fast is fertility declining in Botswana and Zimbabwe? World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThomas, Duncan. How Fast Is Fertility Declining in Botswana and Zimbabwe? Washington, D.C: World Bank, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThomas, Duncan. How Fast Is Fertility Declining in Botswana and Zimbabwe? World Bank, 1994.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.