MLA

of Agriculture. Production, United States. Department, and Marketing Administration. Knox County, Nebraska / U.S. Department of Agriculture, Production and Marketing Administration. U.S. Dept. of Agriculture, Production and Marketing Administration, 0AD. https://collections.library.yale.edu/catalog/15814792.

APA, 6th edition

of Agriculture. Production, U. S. D., & Administration, M. (0 C.E.). Knox County, Nebraska / U.S. Department of Agriculture, Production and Marketing Administration. [Aerial photographs]. U.S. Dept. of Agriculture, Production and Marketing Administration, https://collections.library.yale.edu/catalog/15814792.