Cita APA (7th ed.)
Ray, R. B. (2012). Walden x 40: Essays on Thoreau. Indiana University Press.
Cita Chicago (17th ed.)
Ray, Robert B. Walden X 40: Essays on Thoreau. Bloomington, Ind.: Indiana University Press, 2012.
Cita MLA (9th ed.)
Ray, Robert B. Walden X 40: Essays on Thoreau. Indiana University Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.