Bottner, B., & Mai-Wyss, T. (2007). You have to be nice to someone on their birthday. G. P. Putnam's Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBottner, Barbara, और Tatjana Mai-Wyss. You Have to Be Nice to Someone on Their Birthday. New York: G. P. Putnam's Sons, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBottner, Barbara, और Tatjana Mai-Wyss. You Have to Be Nice to Someone on Their Birthday. G. P. Putnam's Sons, 2007.
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