APA

Mercado-Díaz J. A., Gould W. A., Lucking R. & González G. (2015). Lichens in Puerto Rico: an ecosystem approach. San Juan, Puerto Rico: U.S. Department of Agriculture, Forest Service, Interntational Institute of Tropical Forestry.

Chicago

Mercado-Díaz Joel A, Gould William A, Lucking Robert and González Grizelle. 2015. Lichens in Puerto Rico: an ecosystem approach. San Juan, Puerto Rico: U.S. Department of Agriculture, Forest Service, Interntational Institute of Tropical Forestry.

Harvard

Mercado-Díaz J. A., Gould W. A., Lucking R. and González G. (2015). Lichens in Puerto Rico: an ecosystem approach. San Juan, Puerto Rico: U.S. Department of Agriculture, Forest Service, Interntational Institute of Tropical Forestry.

MLA

Mercado-Díaz Joel A, Gould William A, Lucking Robert and González Grizelle. Lichens in Puerto Rico: an ecosystem approach. San Juan, Puerto Rico: U.S. Department of Agriculture, Forest Service, Interntational Institute of Tropical Forestry. 2015.