Cite

G920a. Big Moon. Spyglass.

MLA

McClintock, Walter, 1870-1949. G920a. Big Moon. Spyglass.. Box 115, folder 5369. 1909 Summer. https://collections.library.yale.edu/catalog/10451169.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 115, folder 5369"])(1909 Summer)[G920a. Big Moon. Spyglass.]. https://collections.library.yale.edu/catalog/10451169.