Klaus, M. H., Kennell, J. H., & Klaus, P. H. (2012). The doula book: How a trained labor companion can help you have a shorter, easier, and healthier birth (3rd ed.). Lifelong Books/Da Capo Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKlaus, Marshall H., John H. Kennell, और Phyllis H. Klaus. The Doula Book: How a Trained Labor Companion Can Help You Have a Shorter, Easier, and Healthier Birth. 3rd ed. Boston, MA: Lifelong Books/Da Capo Press, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKlaus, Marshall H., et al. The Doula Book: How a Trained Labor Companion Can Help You Have a Shorter, Easier, and Healthier Birth. 3rd ed. Lifelong Books/Da Capo Press, 2012.
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