Sandvik และผู้แต่งคนอื่นๆ. (2011) The effect of commercialization of culture on the Ifugao youth : a case study of two Ifugao municipalities in Northern Luzon, Philippines. Chulalongkorn University:ม.ป.ท.Sandvik และผู้แต่งคนอื่นๆ. 2011. The effect of commercialization of culture on the Ifugao youth : a case study of two Ifugao municipalities in Northern Luzon, Philippines. ม.ป.ท.:Chulalongkorn University;Sandvik และผู้แต่งคนอื่นๆ. The effect of commercialization of culture on the Ifugao youth : a case study of two Ifugao municipalities in Northern Luzon, Philippines. ม.ป.ท.:Chulalongkorn University, 2011. Print.