APA استشهاد

Collingwood, R. (1973). The idea of history. OUP.

استشهاد بنمط شيكاغو

Collingwood, R.G. The Idea of History. London: OUP, 1973.

MLA استشهاد

Collingwood, R.G. The Idea of History. OUP, 1973.