BOIS, W. P. D. (1955). The Twenty-One Balloons. The Viking Press.
Chicago Style (17th ed.) CitationBOIS, William Pene Du. The Twenty-One Balloons. The Viking Press, 1955.
MLA (8th ed.) CitationBOIS, William Pene Du. The Twenty-One Balloons. The Viking Press, 1955.
Warning: These citations may not always be 100% accurate.