Studios, recital instruments, compositions
MLA
Wilfred, Thomas, 1889-1968. Studios, recital instruments, compositions. Box 16, folder 220. Undated. https://collections.library.yale.edu/catalog/10015417.
APA, 6th edition
Wilfred, Thomas, 1889-1968. (["Box 16, folder 220"])(Undated)[Studios, recital instruments, compositions]. https://collections.library.yale.edu/catalog/10015417.