APA (7th ed.) Citation

Engebretsen, B. a., (curator), I. S. U. S. C. a. U. A., & Kent, T. H. (1997). Bery Engebretsen letter to Thomas H. Kent regarding fall bird sightings, November 30, 1997.

Chicago Style (17th ed.) Citation

Engebretsen, Beryet al, Iowa State University. Special Collections and University Archives (curator), and Thomas H. Kent. Bery Engebretsen Letter to Thomas H. Kent Regarding Fall Bird Sightings, November 30, 1997. 1997.

MLA (9th ed.) Citation

Engebretsen, Beryet al, et al. Bery Engebretsen Letter to Thomas H. Kent Regarding Fall Bird Sightings, November 30, 1997. 1997.