edited by Malcolm Williams and W. Paul Vogt
Sage, 2011
Buku Teks SO
Abbas Tashakkori, Charles Teddlie
SAGE Publications, 2010
Buku Teks SO
edited by Nigel G. Fielding; Raymond M. Lee; Grant Blank
SAGE Reference, 2017
Buku Teks
editors, Norman K. Denzin, Yvonna S. Lincoln
Sage , 2018
Buku Teks
edited by Norman K. Denzin and Yvonna S. Lincoln
Sage , 2011
Buku Teks SO