Style de citation APA (7e éd.)

Philippines. Office of the President. Presidential Management Staff. (1987). Ethnolinguistic groups in the Cordilleras (SIC). [publisher not identified].

Style de citation Chicago (17e éd.)

Philippines. Office of the President. Presidential Management Staff. Ethnolinguistic Groups in the Cordilleras (SIC). [Place of publication not identified]: [publisher not identified], 1987.

Style de citation MLA (9e éd.)

Philippines. Office of the President. Presidential Management Staff. Ethnolinguistic Groups in the Cordilleras (SIC). [publisher not identified], 1987.