APA

Symposium the Road to Extinction. Problems of Categorizing the Status of Taxa Threatened With Extinction, Fitter R. & Fitter M. (1987). The road to extinction. Huntingdon Road, Cambridge: United Nations Environment Programme.

Chicago

Symposium the Road to Extinction. Problems of Categorizing the Status of Taxa Threatened With Extinction, Fitter Richard and Fitter Maisie. 1987. The road to extinction. Huntingdon Road, Cambridge: United Nations Environment Programme.

Harvard

Symposium the Road to Extinction. Problems of Categorizing the Status of Taxa Threatened With Extinction, Fitter R. and Fitter M. (1987). The road to extinction. Huntingdon Road, Cambridge: United Nations Environment Programme.

MLA

Symposium the Road to Extinction. Problems of Categorizing the Status of Taxa Threatened With Extinction, Fitter Richard and Fitter Maisie. The road to extinction. Huntingdon Road, Cambridge: United Nations Environment Programme. 1987.