Esterer, A. (1972). Dr. Frank Vineyard Visit, 1972. https://oaks.kent.edu/node/3430
Esterer, Arnulf. 1972. “Dr. Frank Vineyard Visit, 1972”. https://oaks.kent.edu/node/3430.
Esterer, A. Dr. Frank Vineyard Visit, 1972. 23 Oct. 1972, https://oaks.kent.edu/node/3430.