RAO, C. S. (1991). ENVIROMENTAL POLLUTION CONTROL ENGG. NEW AGE (I) LTD.
Cita Chicago (17th ed.)RAO, C S. ENVIROMENTAL POLLUTION CONTROL ENGG. NEW DELHI: NEW AGE (I) LTD, 1991.
Cita MLA (9th ed.)RAO, C S. ENVIROMENTAL POLLUTION CONTROL ENGG. NEW AGE (I) LTD, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.