Ong, E. D. (2002). The story of two Japanese firms who chose to do business in RP. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Ong, Edison Dy. "The Story of Two Japanese Firms Who Chose to Do Business in RP." Manila Bulletin 2002.
Lua MLA (9ú heag.)Ong, Edison Dy. "The Story of Two Japanese Firms Who Chose to Do Business in RP." Manila Bulletin, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.