APA-referens (7:e uppl.)
Wertz, W. R. (2014). Lynton Keith Caldwell: An environmental visionary and the national environmental policy act. Indiana University Press.
Chicago-referens (17:e uppl.)
Wertz, Wendy Read. Lynton Keith Caldwell: An Environmental Visionary and the National Environmental Policy Act. Bloomington, Indiana: Indiana University Press, 2014.
MLA-referens (9:e uppl.)
Wertz, Wendy Read. Lynton Keith Caldwell: An Environmental Visionary and the National Environmental Policy Act. Indiana University Press, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.