MLA

Johnston, William Walker Whitehall, 1835-1886. Album Page 72. Verso: Tree at crossroads near Morant Bay, Jamaica; rebels during the Morant Bay Rebellion assembled by this tree on October 12, 1865, immediately before attacking the Court House. Box 1, folder 70. circa 1865. https://collections.library.yale.edu/catalog/15817490.

APA, 6th edition

Johnston, William Walker Whitehall, 1835-1886. (["Box 1, folder 70"])(circa 1865)[Album Page 72. Verso: Tree at crossroads near Morant Bay, Jamaica; rebels during the Morant Bay Rebellion assembled by this tree on October 12, 1865, immediately before attacking the Court House]. https://collections.library.yale.edu/catalog/15817490.