White, W. B. (2020). Caves and Karst of the Greenbrier Valley in West Virginia. 1st ed. 2018. Springer International Publishing.
استشهاد بنمط شيكاغوWhite, William B. Caves and Karst of the Greenbrier Valley in West Virginia. 1st Ed. 2018. Springer International Publishing, 2020.
MLA استشهادWhite, William B. Caves and Karst of the Greenbrier Valley in West Virginia. 1st Ed. 2018. Springer International Publishing, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.