Παραπομπή APA

Collingwood,R G. (1933). An essay on philosophical method. Oxford University Press.

Παραπομπή Chicago Style

Collingwood,R G. An Essay on Philosophical Method. London: Oxford University Press, 1933.

Παραπομπή MLA

Collingwood,R G. An Essay on Philosophical Method. Oxford University Press, 1933.