MLA

Little, Lora C., 1856-1931. Crimes of the cowpox ring : some moving pictures thrown on the dead wall of official silence / Lora C. Little.. 1906. https://collections.library.yale.edu/catalog/17369078.

APA, 6th edition

Little, Lora C., 1856-1931. (1906)[Crimes of the cowpox ring : some moving pictures thrown on the dead wall of official silence / Lora C. Little.]. https://collections.library.yale.edu/catalog/17369078.