(1997). Reinventing Public Relations for the 21st century: Fifth National Public Relations Congress. Philippine Star.
Chicago Style aipamena"Reinventing Public Relations for the 21st Century: Fifth National Public Relations Congress." Philippine Star 1997.
MLA aipamena"Reinventing Public Relations for the 21st Century: Fifth National Public Relations Congress." Philippine Star, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.