APA (7th ed.) Citation

Petersen, P. C. a., (curator), I. S. U. S. C. a. U. A., Blevins, B. L., Moeller, D. W., & Petersen, M. L. (1993). Field notes contributed by Peter C. Petersen, summer 1993.

Chicago Style (17th ed.) Citation

Petersen, Peter C.et al, Iowa State University. Special Collections and University Archives (curator), Brian L. Blevins, Donald W. Moeller, and Mary Lou Petersen. Field Notes Contributed by Peter C. Petersen, Summer 1993. 1993.

MLA (9th ed.) Citation

Petersen, Peter C.et al, et al. Field Notes Contributed by Peter C. Petersen, Summer 1993. 1993.