Não informado. (1937). Air Conditioning and Refrigeration News. Business News Publishing.
Chicago-referens (17:e uppl.)Não informado. Air Conditioning and Refrigeration News. Troy, Mich: Business News Publishing, 1937.
MLA-referens (8:e uppl.)Não informado. Air Conditioning and Refrigeration News. Business News Publishing, 1937.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.