APA引文

Duff, U. G. (1951). A social and economic history of Britain, 1760-1950.

Citação norma Chicago

Duff, Ursula Grant. A Social and Economic History of Britain, 1760-1950. 1951.

MLA引文

Duff, Ursula Grant. A Social and Economic History of Britain, 1760-1950. 1951.

警告：這些引文格式不一定是100％准確.