Παραπομπή APA

Langhorne, R. (1981). Collapse of the concert of Europe: International politics, 1890-1914. Macmillan Press Ltd.

Παραπομπή Chicago Style

Langhorne, Richard. Collapse of the Concert of Europe: International Politics, 1890-1914. London: Macmillan Press Ltd, 1981.

Παραπομπή MLA

Langhorne, Richard. Collapse of the Concert of Europe: International Politics, 1890-1914. Macmillan Press Ltd, 1981.