De Vries, R. G. (2001). Birth by design: Pregnancy, maternity care, and midwifery in North America and Europe. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe Vries, Raymond G. Birth by Design: Pregnancy, Maternity Care, and Midwifery in North America and Europe. New York: Routledge, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDe Vries, Raymond G. Birth by Design: Pregnancy, Maternity Care, and Midwifery in North America and Europe. Routledge, 2001.
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