Lang, V. P. (1982). Air conditioning: Procedures and installation. Delmar Pub.
Lua i Stíl Chicago (17ú heag.)Lang, V. Paul. Air Conditioning: Procedures and Installation. Canada: Delmar Pub, 1982.
Lua MLA (9ú heag.)Lang, V. Paul. Air Conditioning: Procedures and Installation. Delmar Pub, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.