Pinpin, L. C. (1999). Indigenous environmental practices in Cordillera: An approach to environmental education.
Chicago-referens (17:e uppl.)Pinpin, Lilibeth C. Indigenous Environmental Practices in Cordillera: An Approach to Environmental Education. 1999.
MLA-referens (9:e uppl.)Pinpin, Lilibeth C. Indigenous Environmental Practices in Cordillera: An Approach to Environmental Education. 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.