Cita APA (7th ed.)

Gilbert, P. T. (1921). The key to culture: Customs, manners and niceties of society. Geographical Pub.

Cita Chicago (17th ed.)

Gilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Chicago: Geographical Pub, 1921.

Cita MLA (9th ed.)

Gilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Geographical Pub, 1921.