Dela Cruz, R. (2006). Duka Bay: An ecological business paradigan. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Dela Cruz, Rose. "Duka Bay: An Ecological Business Paradigan." Philippine Star 2006.
Lua MLA (9ú heag.)Dela Cruz, Rose. "Duka Bay: An Ecological Business Paradigan." Philippine Star, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.