MLA

Penfield, Edward, 1866-1925, artist. Galakton a nourishing food ; for infants, invalids, nursing mothers and the aged / [graphic]. [1895]. https://collections.library.yale.edu/catalog/16048968.

APA, 6th edition

Penfield, Edward, 1866-1925, artist. ([1895])[Galakton a nourishing food ; for infants, invalids, nursing mothers and the aged / [graphic]]. https://collections.library.yale.edu/catalog/16048968.