Karp, H. (2012). The happiest baby guide to great sleep: Simple solutions for kids from birth to 5 years. William Morrow ; Publishers Group UK [distributor].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKarp, Harvey. The Happiest Baby Guide to Great Sleep: Simple Solutions for Kids from Birth to 5 Years. New York : Enfield: William Morrow ; Publishers Group UK [distributor], 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKarp, Harvey. The Happiest Baby Guide to Great Sleep: Simple Solutions for Kids from Birth to 5 Years. William Morrow ; Publishers Group UK [distributor], 2012.
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