Cite

John K. hillers, photographer of the Powell Survey with his ""wet plate"" photographic outfit about 1873. The white mule was his favorite pack-animal. He named it ""Nigger""

MLA

Dellenbaugh, Frederick Samuel, 1853-1935. John K. hillers, photographer of the Powell Survey with his ""wet plate"" photographic outfit about 1873. The white mule was his favorite pack-animal. He named it ""Nigger"". Box 2 | Folder 42. 1873. https://collections.library.yale.edu/catalog/2017817.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 2 | Folder 42"])(1873)[John K. hillers, photographer of the Powell Survey with his ""wet plate"" photographic outfit about 1873. The white mule was his favorite pack-animal. He named it ""Nigger""]. https://collections.library.yale.edu/catalog/2017817.