Cite
Letter from sister, [undated]
MLA
Not Available. "Letter from sister, [undated]." Duke University. Library. 1950/2011, https://idn.duke.edu/ark:/87924/r4wm14119.
APA
Not Available (1950/2011). Letter from sister, [undated]. Retrieved from https://idn.duke.edu/ark:/87924/r4wm14119
Chicago
Not Available. "Letter from sister, [undated]." 1950/2011. May 6, 2024. https://idn.duke.edu/ark:/87924/r4wm14119.