Styl cytowania APA

Calleo, D. P. (1980). The German problem reconsidered: Germany and the world order : 1870 to the present. Cambridge University Press.

Styl cytowania Chicago

Calleo, David P. The German Problem Reconsidered: Germany and the World Order : 1870 to the Present. Cambridge ; London ; New York ; New Rochelle ; Melburne ; Sydney: Cambridge University Press, 1980.

Styl cytowania MLA

Calleo, David P. The German Problem Reconsidered: Germany and the World Order : 1870 to the Present. Cambridge University Press, 1980.