KNAPP v. SCHWEITZER. The Oyez Project at IIT Chicago-Kent College of Law. 12 February 2012. <http://www.oyez.org/cases/1950-1959/1957/1957_189>.
KNAPP v. SCHWEITZER, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1957/1957_189 (last visited February 12, 2012).
"KNAPP v. SCHWEITZER," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 12, 2012, http://www.oyez.org/cases/1950-1959/1957/1957_189.