Miles, Matthew B. Qualitative data analysis : an expanded source book / Matthew B. Miles, A. Michael Huberman. - 2nd ed. - Thousand Oaks : SAGE Publications, 1994. - 338 p. : ill. ; 28 cm. references p. 318-330 ISBN: 0803955405 RM84.16 Subjects--Topical Terms: Social sciences--Research.Education--Research.