APA

Holdgate M., . (1999). The green web. London: Internacional Union for Conservation of Nature and Natural Resources.

Chicago

Holdgate Martin, . 1999. The green web. London: Internacional Union for Conservation of Nature and Natural Resources.

Harvard

Holdgate M., . (1999). The green web. London: Internacional Union for Conservation of Nature and Natural Resources.

MLA

Holdgate Martin, . The green web. London: Internacional Union for Conservation of Nature and Natural Resources. 1999.