APA (7th ed.) Citation

Smith, D. B. (1991). The pennywhistle tree. Putnam's.

Chicago Style (17th ed.) Citation

Smith, Doris Buchanan. The Pennywhistle Tree. New York: Putnam's, 1991.

MLA (9th ed.) Citation

Smith, Doris Buchanan. The Pennywhistle Tree. Putnam's, 1991.