Não informado. (1942). Fueloil and oil heat. Heating Publishers.
Chicago-viite (17. p.)Não informado. Fueloil and Oil Heat. New York: Heating Publishers, 1942.
MLA-viite (8. p.)Não informado. Fueloil and Oil Heat. Heating Publishers, 1942.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.