Gilbert, P. T. (1921). The key to culture: Customs, manners and niceties of society. Geographical Pub.
Chicago Style aipamenaGilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Chicago: Geographical Pub, 1921.
MLA aipamenaGilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Geographical Pub, 1921.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.