United States. Fuel Administration. (1994). Boiler water treatment. Govt. print. off..
Cita Chicago (17th ed.)United States. Fuel Administration. Boiler Water Treatment. Washington: Govt. print. off., 1994.
Cita MLA (9th ed.)United States. Fuel Administration. Boiler Water Treatment. Govt. print. off., 1994.
Atenció: Aquestes cites poden no estar 100% correctes.