MLA

Johnston, William Walker Whitehall, 1835-1886. Album Page 60. Recto: Queen's Staircase, a hand-hewn stairway in a limestone wall, in Nassau, New Providence. Box 1, folder 58. circa 1860. https://collections.library.yale.edu/catalog/16657605.

APA, 6th edition

Johnston, William Walker Whitehall, 1835-1886. (["Box 1, folder 58"])(circa 1860)[Album Page 60. Recto: Queen's Staircase, a hand-hewn stairway in a limestone wall, in Nassau, New Providence]. https://collections.library.yale.edu/catalog/16657605.