Jeffers, O. (2025). I'm very busy: A (nearly forgotten) birthday book. Philomel Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJeffers, Oliver. I'm Very Busy: A (nearly Forgotten) Birthday Book. New York: Philomel Books, 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJeffers, Oliver. I'm Very Busy: A (nearly Forgotten) Birthday Book. Philomel Books, 2025.
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