APA (7th ed.) Citation

Collingwood, R. G. (1972). An essay on metaphysics. H. Regnery Co..

Chicago Style (17th ed.) Citation

Collingwood, R. G. An Essay on Metaphysics. Chicago: H. Regnery Co., 1972.

MLA (9th ed.) Citation

Collingwood, R. G. An Essay on Metaphysics. H. Regnery Co., 1972.