APA (7th ed.) Citation

Douglass, A. E., & Glock, W. S. (1934). The annual rings of trees.: Tree growth and climatic cycles. Carnegie Institution of Washington.

Chicago Style (17th ed.) Citation

Douglass, A. E., and Waldo S. Glock. The Annual Rings of Trees.: Tree Growth and Climatic Cycles. Washington, D. C.: Carnegie Institution of Washington, 1934.

MLA (9th ed.) Citation

Douglass, A. E., and Waldo S. Glock. The Annual Rings of Trees.: Tree Growth and Climatic Cycles. Carnegie Institution of Washington, 1934.