For an excellent guide to getting started, read Judy McFall's article Getting Started with Pacific Research: Finding Resources and Information on Pacific Research Models and Methodologies.
Issues and guidelines
Education research models, issues and guidelines
Teu le va
Aua’i i le Galuega
Ministry of Education
Health Research Council of New Zealand. Pacific Health Research Guidelines. (2014).
Click on this subject heading for more books: Indigenous Peoples Research Methodology
Journal Articles and Encyclopedias:
Sage Journals Online has articles on indigenous research methodology from a range of journals including AlterNative. Sage Research Methods links to e-books and encyclopedias. Start with the search "indigenous research" Pacific in both.