APA (7th ed.) Citation

Koenig, D. a., (curator), I. S. U. S. C. a. U. A., & Kent, T. H. (1983). Darwin Koenig letter to Thomas H. Kent regarding winter bird sightings, March 4, 1983.

Chicago Style (17th ed.) Citation

Koenig, Darwinet al, Iowa State University. Special Collections and University Archives (curator), and Thomas H. Kent. Darwin Koenig Letter to Thomas H. Kent Regarding Winter Bird Sightings, March 4, 1983. 1983.

MLA (9th ed.) Citation

Koenig, Darwinet al, et al. Darwin Koenig Letter to Thomas H. Kent Regarding Winter Bird Sightings, March 4, 1983. 1983.