(2000). Development powered by volunteers. Philippine National Volunteer Service Coordinating Agency.
Παραπομπή σε μορφή Chicago (17η εκδ.)Development Powered by Volunteers. Quezon City: Philippine National Volunteer Service Coordinating Agency, 2000.
Παραπομπή σε μορφή MLA (9th εκδ.)Development Powered by Volunteers. Philippine National Volunteer Service Coordinating Agency, 2000.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.