Cómo se hace una investigación. Blaxter, L; Hughes, C; and Tight, M Gedisa, Barcelona.
bibtex   
@book{blaxter_como_2000,
	Address = {Barcelona},
	Author = {Blaxter, L and Hughes, C and Tight, M},
	Date = {2000},
	Date-Modified = {2016-09-22 20:24:10 +0000},
	Keywords = {research methods},
	Publisher = {Gedisa},
	Title = {Cómo se hace una investigación}}
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