Petterson, M. (1977). Untitled Illustration 3. https://oaks.kent.edu/node/9332
Petterson, Mark. 1977. “Untitled Illustration 3”. https://oaks.kent.edu/node/9332.
Petterson, M. Untitled Illustration 3. 1 Mar. 1977, https://oaks.kent.edu/node/9332.