Style de citation APA (7e éd.)

Douglas, D. C. (1969). The Norman achievement, 1050-1100. University of California Press.

Style de citation Chicago (17e éd.)

Douglas, David C. The Norman Achievement, 1050-1100. Berkeley: University of California Press, 1969.

Style de citation MLA (8e éd.)

Douglas, David C. The Norman Achievement, 1050-1100. University of California Press, 1969.