Coughlin, C. E. (1968). Helmet and sword, part two. Bloomfield, Mich..
Lua i Stíl Chicago (17ú heag.)Coughlin, Charles E. Helmet and Sword, Part Two. Bloomfield, Mich., 1968.
Lua MLA (8ú heag.)Coughlin, Charles E. Helmet and Sword, Part Two. Bloomfield, Mich., 1968.
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