KLEPPE v. SIERRA CLUB. The Oyez Project at IIT Chicago-Kent College of Law. 16 May 2012. <http://www.oyez.org/cases/1970-1979/1975/1975_75_552>.
KLEPPE v. SIERRA CLUB, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1975/1975_75_552 (last visited May 16, 2012).
"KLEPPE v. SIERRA CLUB," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 16, 2012, http://www.oyez.org/cases/1970-1979/1975/1975_75_552.