The Pamplona Attas live mainly in the Northwestern part of Cagayan. Their language, also called Northern Cagayan Negrito, is closely related to and mutually intelligible with the Ibanag language.
Ecumenical Center for Development. ND. Philippine Regional Profiles. Quezon City: KASIMBAYAN, Inc.
Lewis, M. Paul (ed.), 2009. Ethnologue: Languages of the World, Sixteenth edition. Dallas, Tex.: SIL International, http://www.ethnologue.com/