Langer, W. L., & Gleason, S. E. (1970). The challenge to isolation : the world crisis of 1937-1940 and American foreign policy / by W.L. Langer and S.E. Gleason: The world crisis of 1937-1940 and American foreign policy. Peter Smith.
Chicago Style (17th ed.) CitationLanger, W. L., and S. E. Gleason. The Challenge to Isolation : The World Crisis of 1937-1940 and American Foreign Policy / by W.L. Langer and S.E. Gleason: The World Crisis of 1937-1940 and American Foreign Policy. Peter Smith, 1970.
MLA (9th ed.) CitationLanger, W. L., and S. E. Gleason. The Challenge to Isolation : The World Crisis of 1937-1940 and American Foreign Policy / by W.L. Langer and S.E. Gleason: The World Crisis of 1937-1940 and American Foreign Policy. Peter Smith, 1970.
Warning: These citations may not always be 100% accurate.