Langner, L. L., & Flather, C. H. (1994). Biological diversity: Status and trends in the United States. United States, Dep. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station.
Chicago-Zitierstil (17. Ausg.)Langner, Linda L., und Curtis H. Flather. Biological Diversity: Status and Trends in the United States. Fort Collins, Colo: United States, Dep. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1994.
MLA-Zitierstil (9. Ausg.)Langner, Linda L., und Curtis H. Flather. Biological Diversity: Status and Trends in the United States. United States, Dep. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.