Research Conference on Natural Family Planning, W., Urichie, W. A., & Natural family planning. (1973). Proceedings. Human Life Foundations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रResearch Conference on Natural Family Planning, Warrenton, William A. Urichie, और Natural family planning. Proceedings. Washington, D. C: Human Life Foundations, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रResearch Conference on Natural Family Planning, Warrenton, et al. Proceedings. Human Life Foundations, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.