APA (7th ed.) Citation

Trapp, D. E. a., (curator), I. S. U. S. C. a. U. A., Myers, R. K., Loftus, K. J., & Loftus, T. (1988). Douglas E. Trapp letter to Robert K. Myers regarding bird sightings, June 2, 1988.

Chicago Style (17th ed.) Citation

Trapp, Douglas E.et al, Iowa State University. Special Collections and University Archives (curator), Robert K. Myers, Kevin J. Loftus, and Timothy Loftus. Douglas E. Trapp Letter to Robert K. Myers Regarding Bird Sightings, June 2, 1988. 1988.

MLA (9th ed.) Citation

Trapp, Douglas E.et al, et al. Douglas E. Trapp Letter to Robert K. Myers Regarding Bird Sightings, June 2, 1988. 1988.