Ray, R. B. (2012). Walden x 40: Essays on Thoreau. Indiana University Press.
Citación estilo ChicagoRay, Robert B. Walden X 40: Essays on Thoreau. Bloomington, Ind.: Indiana University Press, 2012.
Cita MLARay, Robert B. Walden X 40: Essays on Thoreau. Indiana University Press, 2012.
Warning: These citations may not always be 100% accurate.