Não informado. (1967). Mcgraw-Hills air and water news. Air and Water News.
Chicago-referens (17:e uppl.)Não informado. Mcgraw-Hills Air and Water News. New York: Air and Water News, 1967.
MLA-referens (8:e uppl.)Não informado. Mcgraw-Hills Air and Water News. Air and Water News, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.