APA (7th ed.) Citation

Harr, D. C. a., (curator), I. S. U. S. C. a. U. A., Kent, T. H., Foote, L., & Hinshaw, L. (1980). Douglas C. Harr letter to Thomas H. Kent regarding bird sightings, February 27, 1980.

Chicago Style (17th ed.) Citation

Harr, Douglas C.et al, Iowa State University. Special Collections and University Archives (curator), Thomas H. Kent, LaVonne Foote, and Linda Hinshaw. Douglas C. Harr Letter to Thomas H. Kent Regarding Bird Sightings, February 27, 1980. 1980.

MLA (9th ed.) Citation

Harr, Douglas C.et al, et al. Douglas C. Harr Letter to Thomas H. Kent Regarding Bird Sightings, February 27, 1980. 1980.