Rossman, Gretchen B Learning in the field : an introduction to qualitative research - พิมพ์ครั้งที่ 3 - Thousand Oaks, CA. : SAGE, 2012 - 365 ISBN: 9781412980487 Subjects--Topical Terms: 1.Social sciences-Research-Methodology 2.Qualitative reasoning. National Library of Medicine Call No.: H 62 / R837L