Cleto, R. B., Dehn, C. J., & Padilla, H. J. (1986). The Ilocos and Cordillera provinces: A general physical and socio-economic profile. Katinnulong Daguiti Umili iti Amianan.
Dyfyniad Arddull ChicagoCleto, Romeo B., Christoph J. Dehn, and Hilario J. Padilla. The Ilocos and Cordillera Provinces: A General Physical and Socio-economic Profile. Baguio City: Katinnulong Daguiti Umili iti Amianan, 1986.
Dyfyniad MLACleto, Romeo B., et al. The Ilocos and Cordillera Provinces: A General Physical and Socio-economic Profile. Katinnulong Daguiti Umili iti Amianan, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.