United States. Bureau of Community Environmental Management. (1971). Environmental health planning. For sale by the Supt. of Docs., U.S. Govt. Print. Off.].
Cita Chicago (17th ed.)United States. Bureau of Community Environmental Management. Environmental Health Planning. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971.
Cita MLA (9th ed.)United States. Bureau of Community Environmental Management. Environmental Health Planning. For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971.
Atenció: Aquestes cites poden no estar 100% correctes.