APA (7th ed.) Citation

Konigsburg, E. L., & Haley, G. E. (1971). Altogether, one at a time. Atheneum.

Chicago Style (17th ed.) Citation

Konigsburg, E. L., and Gail E. Haley. Altogether, One at a Time. New York: Atheneum, 1971.

MLA (9th ed.) Citation

Konigsburg, E. L., and Gail E. Haley. Altogether, One at a Time. Atheneum, 1971.