Philippines. Office of the Governor. (1970). Annual report: Kalinga-Apayao province.
芝加哥风格引文Philippines. Office of the Governor. Annual Report: Kalinga-Apayao Province. 1970.
MLA引文Philippines. Office of the Governor. Annual Report: Kalinga-Apayao Province. 1970.
警告：这些引文格式不一定是100％准确.