Cita APA

Blackstock, P. W. (1969). The secret road to World War Two: Soviet versus western intelligence, 1921-1939. Quadrangle.

Citación estilo Chicago

Blackstock, Paul W. The Secret Road to World War Two: Soviet Versus Western Intelligence, 1921-1939. Chicago, Ill: Quadrangle, 1969.

Cita MLA

Blackstock, Paul W. The Secret Road to World War Two: Soviet Versus Western Intelligence, 1921-1939. Quadrangle, 1969.