Ohio Wine Producers Association. (1993). Markko Vineyard, 1993. https://oaks.kent.edu/node/5899
Ohio Wine Producers Association. 1993. “Markko Vineyard, 1993”. https://oaks.kent.edu/node/5899.
Ohio Wine Producers Association. Markko Vineyard, 1993. 1 Oct. 1993, https://oaks.kent.edu/node/5899.