Du Bois, W. P. (1986). The twenty-one balloons. Puffin Books.
Chicago Style (17th ed.) CitationDu Bois, William Pene. The Twenty-one Balloons. New York, N.Y: Puffin Books, 1986.
MLA (9th ed.) CitationDu Bois, William Pene. The Twenty-one Balloons. Puffin Books, 1986.
Warning: These citations may not always be 100% accurate.