Untitled [Baseball: Catcher giving signal with umpire behind giving count]
MLA
Steinberg, Saul, 1914-1999. Untitled [Baseball: Catcher giving signal with umpire behind giving count]. Box 448, folder 6162. undated. https://collections.library.yale.edu/catalog/11363363.
APA, 6th edition
Steinberg, Saul, 1914-1999. (["Box 448, folder 6162"])(undated)[Untitled [Baseball: Catcher giving signal with umpire behind giving count]]. https://collections.library.yale.edu/catalog/11363363.