APA (7th ed.) Citation

Sommerville, E. Œ., & Ross, M. (1946). "Happy days!": Essays of sorts (1. publ.). Longmans, Green.

Chicago Style (17th ed.) Citation

Sommerville, E. Œ., and Martin Ross. "Happy Days!": Essays of Sorts. 1. publ. London u.a: Longmans, Green, 1946.

MLA (9th ed.) Citation

Sommerville, E. Œ., and Martin Ross. "Happy Days!": Essays of Sorts. 1. publ. Longmans, Green, 1946.

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