Cita APA (7th ed.)

Esser, G., & Overdieck, D. (1991). Modern ecology: Basic and applied aspects. Elsevier.

Cita Chicago (17th ed.)

Esser, Gerd, i Dieter Overdieck. Modern Ecology: Basic and Applied Aspects. Amsterdam: Elsevier, 1991.

Cita MLA (9th ed.)

Esser, Gerd, i Dieter Overdieck. Modern Ecology: Basic and Applied Aspects. Elsevier, 1991.