Não informado. (1981). Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers.
Chicago-viite (17. p.)Não informado. Refrigeration, Air Conditioning and Heat Recovery. Croydon, Inglaterra: Maclaren Publishers, 1981.
MLA-viite (8. p.)Não informado. Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers, 1981.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.