MLA

Schreyvogel, Charles, 1861-1912, artist. Going for reinforcements. [1906?]. https://collections.library.yale.edu/catalog/2016204.

APA, 6th edition

Schreyvogel, Charles, 1861-1912, artist. ([1906?])[Going for reinforcements]. https://collections.library.yale.edu/catalog/2016204.