University of the Philippines. Center for Integrative and Development Studies & University of the Philippines College Baguio. Mga kaalamang-bayan ng Cordillera: Is-torya shi Tubday, is-istolya id Sagada, a-apoh ad Ifugao : (may kauukulang salin sa Filipino).
Chicago-viite (17. p.)University of the Philippines. Center for Integrative and Development Studies ja University of the Philippines College Baguio. Mga Kaalamang-bayan Ng Cordillera: Is-torya Shi Tubday, Is-istolya Id Sagada, A-apoh Ad Ifugao : (may Kauukulang Salin Sa Filipino). Maynila : Komisyon sa Wikang Filipino, c2013.
MLA-viite (9. p.)University of the Philippines. Center for Integrative and Development Studies ja University of the Philippines College Baguio. Mga Kaalamang-bayan Ng Cordillera: Is-torya Shi Tubday, Is-istolya Id Sagada, A-apoh Ad Ifugao : (may Kauukulang Salin Sa Filipino).