APA (7th ed.) Citation

Delafield, E. M. (1930). The optimist. Macmillan.

Chicago Style (17th ed.) Citation

Delafield, E. M. The Optimist. London: Macmillan, 1930.

MLA (8th ed.) Citation

Delafield, E. M. The Optimist. Macmillan, 1930.

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