APA (7th ed.) Citation

(1949). Forty years on... 1909-1949. Handley Page.

Chicago Style (17th ed.) Citation

Forty Years on... 1909-1949. Handley Page, 1949.

MLA (9th ed.) Citation

Forty Years on... 1909-1949. Handley Page, 1949.

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