Philippines. Philippine Information Agency. (1989). Baseline survey on the Cordillera Autonomous Region. Public Opinion Research Division, PIA.
Chicago (17e ed.) BronvermeldingPhilippines. Philippine Information Agency. Baseline Survey on the Cordillera Autonomous Region. [Baguio City?]: Public Opinion Research Division, PIA, 1989.
MLA (9e ed.) BronvermeldingPhilippines. Philippine Information Agency. Baseline Survey on the Cordillera Autonomous Region. Public Opinion Research Division, PIA, 1989.
Let op: Deze citaties zijn niet altijd 100% accuraat.