APA Style

Charman, Andrew. (1997). I Wonder Why : Trees Have Leaves . New York :: Grolier.

Chicago Style

Charman, Andrew. I Wonder Why : Trees Have Leaves. New York :: Grolier, 1997. Text.

MLA Style

Charman, Andrew. I Wonder Why : Trees Have Leaves. New York :: Grolier, 1997. Text.

Turabian Style

Charman, Andrew. I Wonder Why : Trees Have Leaves. New York :: Grolier, 1997. Print.