Elliot Snow, Leonard F. Cushing: a register of their papers in the Library of Congress.
APA Citation
Library of Congress. Manuscript Division. (1969). Elliot Snow, Leonard F. Cushing: a register of their papers in the Library of Congress. Washington: Library of Congress.
MLA Citation
Library of Congress. Manuscript Division. Elliot Snow, Leonard F. Cushing: a Register of Their Papers In the Library of Congress. Washington: Library of Congress, 1969.
Warning: These citations may not always be complete (especially for serials).