Steckel, R., Steckel, M., & Hartman, B. (2011). Wise at heart: Children and adults share words of wisdom. Kids Can Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSteckel, Richard, Michele Steckel, और Brody Hartman. Wise at Heart: Children and Adults Share Words of Wisdom. Toronto, ON: Kids Can Press, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSteckel, Richard, et al. Wise at Heart: Children and Adults Share Words of Wisdom. Kids Can Press, 2011.
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