APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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