"Arthur Schnitzler"
MLA
Thayer, Scofield, 1889-1982. "Arthur Schnitzler". Box 67, folder 1822-1823. n.d.. https://collections.library.yale.edu/catalog/17142339.
APA, 6th edition
Thayer, Scofield, 1889-1982. (["Box 67, folder 1822-1823"])(n.d.)["Arthur Schnitzler"]. https://collections.library.yale.edu/catalog/17142339.