Simpson, D. (2016). Phoebe and her unicorn: Another Pheobe and her unicorn adventure. Andrews McMeel Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSimpson, Dana. Phoebe and Her Unicorn: Another Pheobe and Her Unicorn Adventure. Kansas City, Missouri: Andrews McMeel Publishing, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSimpson, Dana. Phoebe and Her Unicorn: Another Pheobe and Her Unicorn Adventure. Andrews McMeel Publishing, 2016.
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