Iowa. University. Institute of Public Affairs. (1956). Teacher's guide for use with voting in Iowa. s. n.
Chicago Style aipamenaIowa. University. Institute of Public Affairs. Teacher's Guide for Use with Voting in Iowa. Iowa City: s. n, 1956.
MLA aipamenaIowa. University. Institute of Public Affairs. Teacher's Guide for Use with Voting in Iowa. s. n, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.