APA

Liu D. H., Liptak B. G., .Wastewater Treatment. London: Lewis Publishers.

Chicago

Liu David H.F, Liptak Bela G, .Wastewater Treatment. London: Lewis Publishers.

Harvard

Liu D. H., Liptak B. G., .Wastewater Treatment. London: Lewis Publishers.

MLA

Liu David H.F, Liptak Bela G, .London: Lewis Publishers. .