APA
League of nations, League of nations, . (1939). Advisory and technical committee for communications and transit. : .
Chicago
League of nations, League of nations, . 1939. Advisory and technical committee for communications and transit. : .
Harvard
League of nations, League of nations, . (1939). Advisory and technical committee for communications and transit. : .
MLA
League of nations, League of nations, . Advisory and technical committee for communications and transit. : . 1939.
