Map showing streams and irrigation ditches in the water-sheds of Hat Creek, White River, and upper Niobrara in Nebraska / State Engineer's Office ; A.B. McCoskey.
MLA
Engineer, Nebraska. State. Map Showing Streams and Irrigation Ditches in the Water-Sheds of Hat Creek, White River, and Upper Niobrara in Nebraska / State Engineer's Office ; A.B. McCoskey. State Engineer's Office?], 1900. https://collections.library.yale.edu/catalog/15814799.
APA, 6th edition
Engineer, N. S. (1900). Map showing streams and irrigation ditches in the water-sheds of Hat Creek, White River, and upper Niobrara in Nebraska / State Engineer's Office ; A.B. McCoskey. [Maps]. State Engineer's Office?], https://collections.library.yale.edu/catalog/15814799.