APA (7th ed.) Citation

Petersen, P. C. a., (curator), I. S. U. S. C. a. U. A., Blevins, B. L., Dorrance, D., McKay, K., & Petersen, M. L. (1993). Field notes contributed by Peter C. Petersen, fall 1993.

Chicago Style (17th ed.) Citation

Petersen, Peter C.et al, Iowa State University. Special Collections and University Archives (curator), Brian L. Blevins, Dan Dorrance, Kelly McKay, and Mary Lou Petersen. Field Notes Contributed by Peter C. Petersen, Fall 1993. 1993.

MLA (9th ed.) Citation

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