APA

Fulghum R., . (1989). All I really need to know I learned in kindergarten. New York: IVY Books.

Chicago

Fulghum Robert, . 1989. All I really need to know I learned in kindergarten. New York: IVY Books.

Harvard

Fulghum R., . (1989). All I really need to know I learned in kindergarten. New York: IVY Books.

MLA

Fulghum Robert, . All I really need to know I learned in kindergarten. New York: IVY Books. 1989.