Bilignin
MLA
Stein, Gertrude, 1874-1946. Bilignin. Box 162, folder 4250. n.d.. https://collections.library.yale.edu/catalog/2068672.
APA, 6th edition
Stein, Gertrude, 1874-1946. (["Box 162, folder 4250"])(n.d.)[Bilignin]. https://collections.library.yale.edu/catalog/2068672.