Playfair, W. S. (1876). A treatise on the science and practice of midwifery. Henry C. Lea.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPlayfair, William Smoult. A Treatise on the Science and Practice of Midwifery. Philadelphia: Henry C. Lea, 1876.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPlayfair, William Smoult. A Treatise on the Science and Practice of Midwifery. Henry C. Lea, 1876.
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