APA (7th ed.) Citation

Engebretsen, B. a., (curator), I. S. U. S. C. a. U. A., & Bendorf, C. J. (1987). Bery Engebretsen letter to Carl J. Bendorf regarding fall bird sightings, December 1, 1987.

Chicago Style (17th ed.) Citation

Engebretsen, Beryet al, Iowa State University. Special Collections and University Archives (curator), and Carl J. Bendorf. Bery Engebretsen Letter to Carl J. Bendorf Regarding Fall Bird Sightings, December 1, 1987. 1987.

MLA (9th ed.) Citation

Engebretsen, Beryet al, et al. Bery Engebretsen Letter to Carl J. Bendorf Regarding Fall Bird Sightings, December 1, 1987. 1987.