Não informado. (1981). Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Refrigeration, Air Conditioning and Heat Recovery. Croydon, Inglaterra: Maclaren Publishers, 1981.
Lua MLA (8ú heag.)Não informado. Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.