Citazione Stile APA (7a Edizione)

David, W. (1984). Environmental effects of watershed modifications. Philippine Institute for Development Studies.

Citazione stile Chigago Style (17a edizione)

David, Wilfrido. Environmental Effects of Watershed Modifications. Makati, Metro Manila: Philippine Institute for Development Studies, 1984.

Citatione MLA (9a ed.)

David, Wilfrido. Environmental Effects of Watershed Modifications. Philippine Institute for Development Studies, 1984.