Philippines. Office of the Governor. (1970). Annual report: Kalinga-Apayao province.
Cita Chicago (17th ed.)Philippines. Office of the Governor. Annual Report: Kalinga-Apayao Province. 1970.
Cita MLA (9th ed.)Philippines. Office of the Governor. Annual Report: Kalinga-Apayao Province. 1970.
Atenció: Aquestes cites poden no estar 100% correctes.