1. 1) UNESCO: Japanese Funds-in-Trust for the Safeguarding of Intangible Cultural Heritage Terminal report (Safeguarding and Transmission of the Hudhud Chants of the Ifugao), 2008
2. 2) Barton.R.F. : Ifugao Law, Univ. of Califolnia Press, 1919
3. 3) Hayama Atsuko: Local Forest Management in the Rice Terrace Area of Banaue, the Philippines, People and Forest-Polocy and Local Reality in Southeast Asia, the Russian Far East and Japan, pp.275-286, 2003
4. 4) Cultural Properties Preservation and Protection Act (R.A.4846), Section6, 1966
5. 5) P.D.260, Section1, 1973