APA-viite (7. p.)

Wertz, W. R. (2014). Lynton Keith Caldwell: An environmental visionary and the national environmental policy act. Indiana University Press.

Chicago-viite (17. p.)

Wertz, Wendy Read. Lynton Keith Caldwell: An Environmental Visionary and the National Environmental Policy Act. Bloomington, Indiana: Indiana University Press, 2014.

MLA-viite (9. p.)

Wertz, Wendy Read. Lynton Keith Caldwell: An Environmental Visionary and the National Environmental Policy Act. Indiana University Press, 2014.