Cite

G920c. Big Moon. Spyglass.

MLA

McClintock, Walter, 1870-1949. G920c. Big Moon. Spyglass.. Box 115, folder 5371. 1909 Summer. https://collections.library.yale.edu/catalog/10451171.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 115, folder 5371"])(1909 Summer)[G920c. Big Moon. Spyglass.]. https://collections.library.yale.edu/catalog/10451171.