BHARGAVA GOPAL. (1992). POLLUTION AND ITS CONTROL. MITTAL PUBLICATIONS.
Citazione stile Chigago Style (17a edizione)BHARGAVA GOPAL. POLLUTION AND ITS CONTROL. NEW DELHI: MITTAL PUBLICATIONS, 1992.
Citatione MLA (9a ed.)BHARGAVA GOPAL. POLLUTION AND ITS CONTROL. MITTAL PUBLICATIONS, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.