Brennan, W. T., & Ludwig, D. J. (1964). Guide to problems and pratices in firts aid and civil defense. W.C. Brown.
Lua i Stíl Chicago (17ú heag.)Brennan, William T., agus Donald J. Ludwig. Guide to Problems and Pratices in Firts Aid and Civil Defense. Dubuque, Iowa: W.C. Brown, 1964.
Lua MLA (9ú heag.)Brennan, William T., agus Donald J. Ludwig. Guide to Problems and Pratices in Firts Aid and Civil Defense. W.C. Brown, 1964.
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