APA (7th ed.) Citation

Bierman, D. a., (curator), I. S. U. S. C. a. U. A., & Halmi, N. S. (1979). Dick Bierman letter to Nicholas S. Halmi regarding winter bird sightings, February 6, 1979.

Chicago Style (17th ed.) Citation

Bierman, Dicket al, Iowa State University. Special Collections and University Archives (curator), and Nicholas S. Halmi. Dick Bierman Letter to Nicholas S. Halmi Regarding Winter Bird Sightings, February 6, 1979. 1979.

MLA (9th ed.) Citation

Bierman, Dicket al, et al. Dick Bierman Letter to Nicholas S. Halmi Regarding Winter Bird Sightings, February 6, 1979. 1979.