APA (7th ed.) Citation

Petersen, P. C. a., (curator), I. S. U. S. C. a. U. A., Fawks, E., Halmi, N. S., Lorenzen, F. J., Lorenzen, T., . . . Gielens, B. (1977). Peter C. Peterson letter to Nicholas S. Halmi regarding bird sighitings, February 13, 1977.

Chicago Style (17th ed.) Citation

Petersen, Peter C.et al, Iowa State University. Special Collections and University Archives (curator), Elton Fawks, Nicholas S. Halmi, Frederick J. Lorenzen, Ted Lorenzen, John Petersen, and Bryan Gielens. Peter C. Peterson Letter to Nicholas S. Halmi Regarding Bird Sighitings, February 13, 1977. 1977.

MLA (9th ed.) Citation

Petersen, Peter C.et al, et al. Peter C. Peterson Letter to Nicholas S. Halmi Regarding Bird Sighitings, February 13, 1977. 1977.