Krug, E., & Quillen, I. J. (1952). Citizens Now: Civics for Young Citizens. Chicago: Scott, Foresman & Company.
Chicago Style aipamenaKrug, Edward., và I. James Quillen. Citizens Now: Civics for Young Citizens. Chicago: Scott, Foresman & Company, 1952.
MLA aipamenaKrug, Edward., và I. James Quillen. Citizens Now: Civics for Young Citizens. Chicago: Scott, Foresman & Company, 1952.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.