APA (7th ed.) Citation

Engebretsen, B. a., (curator), I. S. U. S. C. a. U. A., & Dinsmore, J. J. (1987). Bery Engebretsen letter to James J. Dinsmore regarding summer bird sightings, August 20, 1987.

Chicago Style (17th ed.) Citation

Engebretsen, Beryet al, Iowa State University. Special Collections and University Archives (curator), and James J. Dinsmore. Bery Engebretsen Letter to James J. Dinsmore Regarding Summer Bird Sightings, August 20, 1987. 1987.

MLA (9th ed.) Citation

Engebretsen, Beryet al, et al. Bery Engebretsen Letter to James J. Dinsmore Regarding Summer Bird Sightings, August 20, 1987. 1987.