Cite

[Cowboy with pistol in doorway of bar, holding up crowd of men], lobby card, 11 x 14

MLA

[Cowboy with Pistol in Doorway of Bar, Holding up Crowd of Men], Lobby Card, 11 x 14. 0AD. https://collections.library.yale.edu/catalog/2019910.

APA, 6th edition

[Cowboy with pistol in doorway of bar, holding up crowd of men], lobby card, 11 x 14. (0 C.E.). https://collections.library.yale.edu/catalog/2019910.