APA (7th ed.) Citation

Petherick, R. C. (1900). Twice one are two. Raphael Tuck & Sons.

Chicago Style (17th ed.) Citation

Petherick, Rosa C. Twice One Are Two. London ; New York: Raphael Tuck & Sons, 1900.

MLA (9th ed.) Citation

Petherick, Rosa C. Twice One Are Two. Raphael Tuck & Sons, 1900.

Warning: These citations may not always be 100% accurate.