Markko Vineyard. (2016). 1980s, Arnulf Esterer. https://oaks.kent.edu/node/3458
Markko Vineyard. 2016. “1980s, Arnulf Esterer”. https://oaks.kent.edu/node/3458.
Markko Vineyard. 1980s, Arnulf Esterer. 25 Oct. 2016, https://oaks.kent.edu/node/3458.