Ohio Wine Producers Association. (1992). Willow Hill Vineyards, 1992. https://oaks.kent.edu/node/8394
Ohio Wine Producers Association. 1992. “Willow Hill Vineyards, 1992”. https://oaks.kent.edu/node/8394.
Ohio Wine Producers Association. Willow Hill Vineyards, 1992. 1 May 1992, https://oaks.kent.edu/node/8394.