APA (7th ed.) Citation

Bailey, M., & Leavell, U. W. (1951). Worlds to explore: The mastery of reading. American Book.

Chicago Style (17th ed.) Citation

Bailey, Matilda, and Ullin W. Leavell. Worlds to Explore: The Mastery of Reading. New York: American Book, 1951.

MLA (9th ed.) Citation

Bailey, Matilda, and Ullin W. Leavell. Worlds to Explore: The Mastery of Reading. American Book, 1951.