Johnson, C. (2020). Grand: A grandparent's wisdom for a happy life. Hanover Square Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Charles. Grand: A Grandparent's Wisdom for a Happy Life. Toronto, Ontario, Canada: Hanover Square Press, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnson, Charles. Grand: A Grandparent's Wisdom for a Happy Life. Hanover Square Press, 2020.
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