Lutz, W. (1987). Finnish fertility since 1722: Lessons from an extended decline. The Population Research Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLutz, Wolfgang. Finnish Fertility Since 1722: Lessons from an Extended Decline. Finland: The Population Research Institute, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLutz, Wolfgang. Finnish Fertility Since 1722: Lessons from an Extended Decline. The Population Research Institute, 1987.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.