MLA

Palmquist, Peter E. (1936-2003). Ambrotype with a horizontal orientation in a half case, of an exterior group portrait of a girl, a boy, three women, and three men, identified as members of the Peralta family. Box 17, folder 163. circa 1855-59. https://collections.library.yale.edu/catalog/2007984.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 17, folder 163"])(circa 1855-59)[Ambrotype with a horizontal orientation in a half case, of an exterior group portrait of a girl, a boy, three women, and three men, identified as members of the Peralta family]. https://collections.library.yale.edu/catalog/2007984.