Charlotte Zolotow. (1990). Big Sister and Little Sister (First Edition.). HarperCollins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCharlotte Zolotow. Big Sister and Little Sister. First Edition. HarperCollins, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCharlotte Zolotow. Big Sister and Little Sister. First Edition. HarperCollins, 1990.
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