PUFFETT, R. (1986). Plumbing Services Volume 3, Gas Fitting Rj Puffett, Lj. Hossack. McGraw-Hill.
Chicago-referens (17:e uppl.)PUFFETT, RJ. Plumbing Services Volume 3, Gas Fitting Rj Puffett, Lj. Hossack. McGraw-Hill, 1986.
MLA-referens (8:e uppl.)PUFFETT, RJ. Plumbing Services Volume 3, Gas Fitting Rj Puffett, Lj. Hossack. McGraw-Hill, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.