APA

Susan, .Principles of Environmental Engineering and Science. New York :Mcgraw hill ,2014: .

Chicago

Susan, .Principles of Environmental Engineering and Science. New York :Mcgraw hill ,2014: .

Harvard

Susan, .Principles of Environmental Engineering and Science. New York :Mcgraw hill ,2014: .

MLA

Susan, .New York :Mcgraw hill ,2014: . .