Abiven, K. Spanish island to be fully powered by wind, water. Manila Bulletin.
Chicago-viite (17. p.)Abiven, Katell. "Spanish Island to Be Fully Powered by Wind, Water." Manila Bulletin .
MLA-viite (9. p.)Abiven, Katell. "Spanish Island to Be Fully Powered by Wind, Water." Manila Bulletin, .
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.