ASTRUP v. IMMIGRATION SERVICE. The Oyez Project at IIT Chicago-Kent College of Law. 12 February 2012. <http://www.oyez.org/cases/1970-1979/1970/1970_840>.
ASTRUP v. IMMIGRATION SERVICE, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1970/1970_840 (last visited February 12, 2012).
"ASTRUP v. IMMIGRATION SERVICE," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 12, 2012, http://www.oyez.org/cases/1970-1979/1970/1970_840.