MLA

U.S.A. General Hospital, Chestnut Hill [Graphic]. Publ. b. E. Inger, Entered according to act of Congress in the year 1863 by E. Inger in the Clerks Office of the Dist. Court of the Eastern District of Penna, 0AD. https://collections.library.yale.edu/catalog/17338484.

APA, 6th edition

U.S.A. General Hospital, Chestnut Hill [graphic]. (0 C.E.). [Engravings]. Publ. b. E. Inger, Entered according to act of Congress in the year 1863 by E. Inger in the Clerks Office of the Dist. Court of the Eastern District of Penna. https://collections.library.yale.edu/catalog/17338484.