Philippines. Office of the President. Presidential Management Staff. (1987). Ethnolinguistic groups in the Cordilleras (SIC). [publisher not identified].
Chicago-referens (17:e uppl.)Philippines. Office of the President. Presidential Management Staff. Ethnolinguistic Groups in the Cordilleras (SIC). [Place of publication not identified]: [publisher not identified], 1987.
MLA-referens (9:e uppl.)Philippines. Office of the President. Presidential Management Staff. Ethnolinguistic Groups in the Cordilleras (SIC). [publisher not identified], 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.