APA (7th ed.) Citation

Armstrong, E. a., (curator), I. S. U. S. C. a. U. A., Armstrong, E., Dixon, M. D., & Thompson, D. (1983). Field reports by Eugene Armstrong.

Chicago Style (17th ed.) Citation

Armstrong, Eugeneet al, Iowa State University. Special Collections and University Archives (curator), Eloise Armstrong, Mark D. Dixon, and Dennis Thompson. Field Reports by Eugene Armstrong. 1983.

MLA (9th ed.) Citation

Armstrong, Eugeneet al, et al. Field Reports by Eugene Armstrong. 1983.