APA-referens (7:e uppl.)
Williams, J. A. (2007). Turning to nature in Germany: Hiking, nudism, and conservation, 1900-1940. Stanford University Press.
Chicago-referens (17:e uppl.)
Williams, John Alexander. Turning to Nature in Germany: Hiking, Nudism, and Conservation, 1900-1940. Stanford: Stanford University Press, 2007.
MLA-referens (9:e uppl.)
Williams, John Alexander. Turning to Nature in Germany: Hiking, Nudism, and Conservation, 1900-1940. Stanford University Press, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.