Cite

"Thirty miles straight ahead, turn right at Spooky Canyon. That's where you'll find the graves of all the Apaches who signed the peace treaty!"

MLA

Harrington, Oliver W. (Oliver Wendell), 1912-1995. "Thirty miles straight ahead, turn right at Spooky Canyon. That's where you'll find the graves of all the Apaches who signed the peace treaty!". Box 35 (Oversize). undated. https://collections.library.yale.edu/catalog/33075800.

APA, 6th edition

Harrington, Oliver W. (Oliver Wendell), 1912-1995. (["Box 35 (Oversize)"])(undated)["Thirty miles straight ahead, turn right at Spooky Canyon. That's where you'll find the graves of all the Apaches who signed the peace treaty!"]. https://collections.library.yale.edu/catalog/33075800.