Zweiback, M. (2009). Keys to toilet training (2nd ed.). Barron's Educational Series, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZweiback, Meg. Keys to Toilet Training. 2nd ed. Hauppauge, N.Y.: Barron's Educational Series, Inc., 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZweiback, Meg. Keys to Toilet Training. 2nd ed. Barron's Educational Series, Inc., 2009.
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