Cita APA (7th ed.)

Cren, E. L. (1980). The functioning of freshwater ecosystems. Cambridge University Press.

Cita Chicago (17th ed.)

Cren, E.D. Le. The Functioning of Freshwater Ecosystems. Cambridge: Cambridge University Press, 1980.

Cita MLA (9th ed.)

Cren, E.D. Le. The Functioning of Freshwater Ecosystems. Cambridge University Press, 1980.