APA

Miller G. L., Lugo A. E., . (2009). Guide to the ecological systems of Puerto Rico. [San Juan, PR]: U. S. Dept. of Agriculture, Forest Service, International Institute of Tropical Forestry.

Chicago

Miller Gary L, Lugo Ariel E, . 2009. Guide to the ecological systems of Puerto Rico. [San Juan, PR]: U. S. Dept. of Agriculture, Forest Service, International Institute of Tropical Forestry.

Harvard

Miller G. L., Lugo A. E., . (2009). Guide to the ecological systems of Puerto Rico. [San Juan, PR]: U. S. Dept. of Agriculture, Forest Service, International Institute of Tropical Forestry.

MLA

Miller Gary L, Lugo Ariel E, . Guide to the ecological systems of Puerto Rico. [San Juan, PR]: U. S. Dept. of Agriculture, Forest Service, International Institute of Tropical Forestry. 2009.