Engelmann, G. I. (1991). Water quality conservation for bubtainable development. Universidad Nacional Autónoma de México.
Citazione stile Chigago Style (17a edizione)Engelmann, Gabriele I. Water Quality Conservation for Bubtainable Development. Universidad Nacional Autónoma de México, 1991.
Citatione MLA (9a ed.)Engelmann, Gabriele I. Water Quality Conservation for Bubtainable Development. Universidad Nacional Autónoma de México, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.