APA (7th ed.) Citation

Roberts, H. L. (1927). The Cyclopaedia of Social Usage: Manners and customs of the twentieth century By Helen L. Roberts (New and Revised Edition.).

Chicago Style (17th ed.) Citation

Roberts, Helen L. The Cyclopaedia of Social Usage: Manners and Customs of the Twentieth Century By Helen L. Roberts. New and Revised Edition. New York - London, 1927.

MLA (9th ed.) Citation

Roberts, Helen L. The Cyclopaedia of Social Usage: Manners and Customs of the Twentieth Century By Helen L. Roberts. New and Revised Edition. 1927.