APA (7th ed.) Citation

Petersen, P. C. a., (curator), I. S. U. S. C. a. U. A., Hahn, A. C., Dwyer, T. L., & Petersen, M. L. (1981). Rare bird documentation form for Glaucous Gull at Lock and Dam 15, 1981.

Chicago Style (17th ed.) Citation

Petersen, Peter C.et al, Iowa State University. Special Collections and University Archives (curator), Allan C. Hahn, Timothy L. Dwyer, and Mary Lou Petersen. Rare Bird Documentation Form for Glaucous Gull at Lock and Dam 15, 1981. 1981.

MLA (9th ed.) Citation

Petersen, Peter C.et al, et al. Rare Bird Documentation Form for Glaucous Gull at Lock and Dam 15, 1981. 1981.