APA Citation

Alfaro, M. d. R. (1993). The Air a Resource Without Borders, discussed in Agenda 21. Universidad Nacional, Costa Rica.

Chicago Style Citation

Alfaro, María del Rosario. The Air a Resource Without Borders, Discussed in Agenda 21. Universidad Nacional, Costa Rica, 1993.

MLA Citation

Alfaro, María del Rosario. The Air a Resource Without Borders, Discussed in Agenda 21. Universidad Nacional, Costa Rica, 1993.

Warning: These citations may not always be 100% accurate.