APA

Pennington K. L. a. T. V. C. ., .Introduction to water Resources and Environmental Issues. New York: Cambridge univerity prees, 2015: .

Chicago

Pennington Karrie Lynn and Thomas V Cech, .Introduction to water Resources and Environmental Issues. New York: Cambridge univerity prees, 2015: .

Harvard

Pennington K. L. a. T. V. C. ., .Introduction to water Resources and Environmental Issues. New York: Cambridge univerity prees, 2015: .

MLA

Pennington Karrie Lynn and Thomas V Cech, .New York: Cambridge univerity prees, 2015: . .