APA (7th ed.) Citation

Gribble, L. R. (1941). Heroes of the fighting R.A.F. G.G. Harrap.

Chicago Style (17th ed.) Citation

Gribble, Leonard R. Heroes of the Fighting R.A.F. London [etc.]: G.G. Harrap, 1941.

MLA (9th ed.) Citation

Gribble, Leonard R. Heroes of the Fighting R.A.F. G.G. Harrap, 1941.