APA (7th ed.) Citation

Coe, G., Koehler, C. I., & Koehler, A. (1964). The how and why wonder book of trees. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Coe, Geoffrey, Cynthia I. Koehler, and Alvin Koehler. The How and Why Wonder Book of Trees. New York: Grosset & Dunlap, 1964.

MLA (9th ed.) Citation

Coe, Geoffrey, et al. The How and Why Wonder Book of Trees. Grosset & Dunlap, 1964.