APA način citiranja

Ramos O'hara, J. A. (1996). Indicators of environmental impact: Plan of the improvement of the high watershed of the Virilla river, Costa Rica.

Čikaški stil citiranja

Ramos O'hara, Jorge A. Indicators of Environmental Impact: Plan of the Improvement of the High Watershed of the Virilla River, Costa Rica. 1996.

MLA način citiranja

Ramos O'hara, Jorge A. Indicators of Environmental Impact: Plan of the Improvement of the High Watershed of the Virilla River, Costa Rica. 1996.