PETROWSKI v. HAWKEYE-SECURITY CO.. The Oyez Project at IIT Chicago-Kent College of Law. 16 May 2012. <http://www.oyez.org/cases/1950-1959/1955/1955_469>.
PETROWSKI v. HAWKEYE-SECURITY CO., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1955/1955_469 (last visited May 16, 2012).
"PETROWSKI v. HAWKEYE-SECURITY CO.," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 16, 2012, http://www.oyez.org/cases/1950-1959/1955/1955_469.