MLA

Stenzel, Franz (1906-1998). [Headdress, bow and arrows, and the egg of a skate.] Pencil drawing with colored pencil, 18.1 x 23 cm.. Box 5, folder 89. 1859 Oct. https://collections.library.yale.edu/catalog/2003157.

APA, 6th edition

Stenzel, Franz (1906-1998). (["Box 5, folder 89"])(1859 Oct)[[Headdress, bow and arrows, and the egg of a skate.] Pencil drawing with colored pencil, 18.1 x 23 cm.]. https://collections.library.yale.edu/catalog/2003157.