APA (7th ed.) Citation

Harr, D. C. a., (curator), I. S. U. S. C. a. U. A., & Halmi, N. S. (1979). Douglas C. Harr letter to Nicholas S. Halmi regarding additional spring bird sightings, May 29, 1979.

Chicago Style (17th ed.) Citation

Harr, Douglas C.et al, Iowa State University. Special Collections and University Archives (curator), and Nicholas S. Halmi. Douglas C. Harr Letter to Nicholas S. Halmi Regarding Additional Spring Bird Sightings, May 29, 1979. 1979.

MLA (9th ed.) Citation

Harr, Douglas C.et al, et al. Douglas C. Harr Letter to Nicholas S. Halmi Regarding Additional Spring Bird Sightings, May 29, 1979. 1979.