Pearson, A. M. (2017). Force of nature: George Fell, founder of the natural areas movement. The University of Wisconsin Press.
Cita Chicago (17th ed.)Pearson, Arthur Melville. Force of Nature: George Fell, Founder of the Natural Areas Movement. Madison, Wisconsin: The University of Wisconsin Press, 2017.
Cita MLA (9th ed.)Pearson, Arthur Melville. Force of Nature: George Fell, Founder of the Natural Areas Movement. The University of Wisconsin Press, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.
