Betonio, S. M. Low cost water purifier for residents of urban poor communities.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBetonio, Salvador M. Low Cost Water Purifier for Residents of Urban Poor Communities. Thesis (BFA)--University of the Philippines.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBetonio, Salvador M. Low Cost Water Purifier for Residents of Urban Poor Communities.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.