Hornbeck, D. (1972). Untitled Illustration 7 (1–). https://oaks.kent.edu/node/9120
Hornbeck, Doug. 1972. “Untitled Illustration 7”. https://oaks.kent.edu/node/9120.
Hornbeck, Doug. Untitled Illustration 7. 1 Jan. 1972, https://oaks.kent.edu/node/9120.