Tough, P. (2016). Helping children succeed: What works and why (Unabridged.). Tantor Media.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTough, Paul. Helping Children Succeed: What Works and Why. Unabridged. Old Saybrook: Tantor Media, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTough, Paul. Helping Children Succeed: What Works and Why. Unabridged. Tantor Media, 2016.
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