Cita APA

European Committee for the Conservation of Nature and Natura. (1968). Freshwater: Three studies. [S.l.]: Council of Europe.

Citación estilo Chicago

European Committee for the Conservation of Nature and Natura. Freshwater: Three Studies. [S.l.]: Council of Europe, 1968.

Cita MLA

European Committee for the Conservation of Nature and Natura. Freshwater: Three Studies. [S.l.]: Council of Europe, 1968.