Written by Jill Eggleton. (2018). Big hippo and little hippo. 长江少年儿童出版社.
Chicago Style aipamenaWritten by Jill Eggleton. Big Hippo and Little Hippo. 长江少年儿童出版社, 2018.
MLA aipamenaWritten by Jill Eggleton. Big Hippo and Little Hippo. 长江少年儿童出版社, 2018.
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