APA (7th ed.) Citation

(2005). I want a hippopotamus for Christmas. HarperCollins.

Chicago Style (17th ed.) Citation

I Want a Hippopotamus for Christmas. [New York]: HarperCollins, 2005.

MLA (9th ed.) Citation

I Want a Hippopotamus for Christmas. HarperCollins, 2005.

Warning: These citations may not always be 100% accurate.