APA (7th ed.) Citation

Gill, T., & Dowling, E. C. (1943). The forestry directory. American Tree Association.

Chicago Style (17th ed.) Citation

Gill, Tom, and Ellen C. Dowling. The Forestry Directory. Washington: American Tree Association, 1943.

MLA (9th ed.) Citation

Gill, Tom, and Ellen C. Dowling. The Forestry Directory. American Tree Association, 1943.