MLA

Rock, Little, et al. Arkansas Fills the Bill. s.n, 0AD. https://collections.library.yale.edu/catalog/2068423.

APA, 6th edition

Rock, L., Fort Smith R.R. Co, S. L., Iron Mountain, & Company., S. R. (0 C.E.). Arkansas fills the bill [Advertisements, Photomechanical prints, Promotional literature]. s.n. https://collections.library.yale.edu/catalog/2068423.