MLA

Regan, Ken, et al. A Chorus Line, Donna McKechie and Michael Bennett at Rehearsal. 0AD. https://collections.library.yale.edu/catalog/2027727.

APA, 6th edition

Regan, K., Regan, K., & photographer. (0 C.E.). A Chorus Line, Donna McKechie and Michael Bennett at rehearsal [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2027727.