6Michael Quinn Patton. Qualitative research and evaluation methods [M].Sage Publications,Inc,2002.
7Jon Altrnan and John Taylor. Statistical needs in Indigenous affairs: the role of the 2002 NATSIS[J]. Assessing the evidence indigenous sociceconomic outcomes.
8Helen C. Chase , Dr.P.H. Report on Federal Statistical Needs[J]. A.J.P.H. FEBRUARY, 1972.