Hobbs, W. H. 1. (1945). The fortress islands of the Pacific. J. W. Edwards.
Lua i Stíl Chicago (17ú heag.)Hobbs, William Herbert 1864. The Fortress Islands of the Pacific. Ann Arbor, Michigan: J. W. Edwards, 1945.
Lua MLA (9ú heag.)Hobbs, William Herbert 1864. The Fortress Islands of the Pacific. J. W. Edwards, 1945.
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