Não informado. (1977). Fueloil and oil heat and solar systems. Industry Publications.
Chicago-referens (17:e uppl.)Não informado. Fueloil and Oil Heat and Solar Systems. Cedar Grove, NJ: Industry Publications, 1977.
MLA-referens (8:e uppl.)Não informado. Fueloil and Oil Heat and Solar Systems. Industry Publications, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.