On the brink of extinction :
conserving the diversity of life /
Edward C. Wolf.

APA Citation

Wolf, E. C. (1987). On the brink of extinction: conserving the diversity of life. Washington, D.C.: Worldwatch Institute.

MLA Citation

Wolf, Edward C. On the Brink of Extinction: Conserving the Diversity of Life. Washington, D.C.: Worldwatch Institute, 1987.

Warning: These citations may not always be complete (especially for serials).