Bayles, S. (2007). Laugh and learn about childbirth (New and updated.). Expect This L.L.C..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBayles, Sheri. Laugh and Learn About Childbirth. New and updated. [United States]: Expect This L.L.C., 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBayles, Sheri. Laugh and Learn About Childbirth. New and updated. Expect This L.L.C., 2007.
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