Social Weather Stations & National Economic and Development Authority. Training and Development Issues Project. (1990). The September 1989 public opinion survey: An interim report to the Training and Development Issues Project, National Economic and Development Authority. Social Weather Stations.
Čikaški stil citiranja (17. izdanje)Social Weather Stations i National Economic and Development Authority. Training and Development Issues Project. The September 1989 Public Opinion Survey: An Interim Report to the Training and Development Issues Project, National Economic and Development Authority. Quezon City: Social Weather Stations, 1990.
MLA način citiranja (8. izdanje)Social Weather Stations i National Economic and Development Authority. Training and Development Issues Project. The September 1989 Public Opinion Survey: An Interim Report to the Training and Development Issues Project, National Economic and Development Authority. Social Weather Stations, 1990.