@book{269244,
	author = {Rossman, Gretchen B. and Rallis, Sharon F.},
	title = {An introduction to qualitative research :},
	publisher = {SAGE Publications, Inc., },
	year = {[2017]},
	address = {Thousand Oaks :},
	edition = {Fourth Edition.},
	note = {Revised edition of the authors' Learning in the field, 2012.}
}