Cite
MLA (8th Edition)
Walsh, Ken. A Tunnel Runs through It: an Inside View of the Tualatin Mountains. U.S. Dept. of the Interior, U.S. Geological Survey, 2011.
APA (7th Edition)
Walsh, K. (2011). A tunnel runs through it: An inside view of the Tualatin Mountains. U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago (17th Edition)
Walsh, Ken. “A Tunnel Runs through It : an inside View of the Tualatin Mountains.” Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2011.