"Swells monument at Neeah Bay near Webster's Point. Swell killed March 1st 1861. Monument built and completed Apr. 1861." Pencil drawing with wash, 18.2 x 12.9 cm.
MLA
Stenzel, Franz. "Swells Monument at Neeah Bay near Webster's Point. Swell Killed March 1st 1861. Monument Built and Completed Apr. 1861." Pencil Drawing with Wash, 18.2 x 12.9 Cm. 0AD. https://collections.library.yale.edu/catalog/2003208.
APA, 6th edition
Stenzel, F. (0 C.E.). "Swells monument at Neeah Bay near Webster's Point. Swell killed March 1st 1861. Monument built and completed Apr. 1861." Pencil drawing with wash, 18.2 x 12.9 cm. https://collections.library.yale.edu/catalog/2003208.