APA (7th ed.) Citation

Douglass, A. E. (1937). Tree rings and chronology. University of Arizona.

Chicago Style (17th ed.) Citation

Douglass, A. E. Tree Rings and Chronology. Tucson, Ariz.: University of Arizona, 1937.

MLA (9th ed.) Citation

Douglass, A. E. Tree Rings and Chronology. University of Arizona, 1937.

Warning: These citations may not always be 100% accurate.