Cita APA (7a ed.)
Preston, R. A. (1977). The defence of the undefended border: Planning for war in North America, 1867-1939. McGill-Queen's University Press.
Cita Chicago Style (17a ed.)
Preston, Richard Arthur. The Defence of the Undefended Border: Planning for War in North America, 1867-1939. Montreal: McGill-Queen's University Press, 1977.
Cita MLA (9a ed.)
Preston, Richard Arthur. The Defence of the Undefended Border: Planning for War in North America, 1867-1939. McGill-Queen's University Press, 1977.
Precaución: Estas citas no son 100% exactas.