APA
Kunhardt P. B., . (1987). Life smiles back. New York: Fireside Books.
Chicago
Kunhardt Philip B, . 1987. Life smiles back. New York: Fireside Books.
Harvard
Kunhardt P. B., . (1987). Life smiles back. New York: Fireside Books.
MLA
Kunhardt Philip B, . Life smiles back. New York: Fireside Books. 1987.