APA (7th ed.) Citation

Collingwood, R. G. (1946). The idea of history / by R.G. Collingwood. Clarendon Press.

Chicago Style (17th ed.) Citation

Collingwood, R. G. The Idea of History / by R.G. Collingwood. Oxford: Clarendon Press, 1946.

MLA (9th ed.) Citation

Collingwood, R. G. The Idea of History / by R.G. Collingwood. Clarendon Press, 1946.

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