United States. Fuel Administration. (1994). Boiler water treatment. Govt. print. off..
Citazione stile Chigago Style (17a edizione)United States. Fuel Administration. Boiler Water Treatment. Washington: Govt. print. off., 1994.
Citatione MLA (9a ed.)United States. Fuel Administration. Boiler Water Treatment. Govt. print. off., 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.