Interviews in qualitative research 
King, Nigel. 
 - Second edition. 
 -  SAGE Publication Ltd.  2019 
 - viii, 349 pages 
978-1-44627497-2
Quantitative research.
GS 001.42 K521 2019
                        978-1-44627497-2
Quantitative research.
GS 001.42 K521 2019