APA (7th ed.) Citation

(2012). I've lost my hippopotamus: More than 100 poems. Greenwillow Books.

Chicago Style (17th ed.) Citation

I've Lost My Hippopotamus: More than 100 Poems. New York: Greenwillow Books, 2012.

MLA (9th ed.) Citation

I've Lost My Hippopotamus: More than 100 Poems. Greenwillow Books, 2012.

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