APA (7th ed.) Citation

Perry, D. R., & Merschel, S. E. (1980). Journey into a hollow tree. Enslow Publishers.

Chicago Style (17th ed.) Citation

Perry, Donald R., and Sylvia E. Merschel. Journey into a Hollow Tree. Hillside, N.J.: Enslow Publishers, 1980.

MLA (9th ed.) Citation

Perry, Donald R., and Sylvia E. Merschel. Journey into a Hollow Tree. Enslow Publishers, 1980.