Pinpin, L. C. (1999). Indigenous environmental practices in Cordillera: An approach to environmental education.
Čikaški stil citiranja (17. izdanje)Pinpin, Lilibeth C. Indigenous Environmental Practices in Cordillera: An Approach to Environmental Education. 1999.
MLA način citiranja (9. izdanje)Pinpin, Lilibeth C. Indigenous Environmental Practices in Cordillera: An Approach to Environmental Education. 1999.
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