Cole, D. H. (1956). Imperial military geography: The geographical background of the defence problems of the British Commonwealth (12th ed.). Sifton Praed.
Chicago-referens (17:e uppl.)Cole, D. H. Imperial Military Geography: The Geographical Background of the Defence Problems of the British Commonwealth. 12th ed. London: Sifton Praed, 1956.
MLA-referens (8:e uppl.)Cole, D. H. Imperial Military Geography: The Geographical Background of the Defence Problems of the British Commonwealth. 12th ed. Sifton Praed, 1956.
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