Hill, H. C. (1928). Community civics. Ginn & Company.
Chicago Style aipamenaHill, Howard C. Community Civics. Boston: Ginn & Company, 1928.
MLA aipamenaHill, Howard C. Community Civics. Ginn & Company, 1928.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.