"Song of Tefari" (6886, 6888)
MLA
Beinecke, Edwin J. (Edwin John), 1886-1970. "Song of Tefari" (6886, 6888). Box 42, folder 939. undated. https://collections.library.yale.edu/catalog/2042631.
APA, 6th edition
Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 42, folder 939"])(undated)["Song of Tefari" (6886, 6888)]. https://collections.library.yale.edu/catalog/2042631.