Writer’s choice
From the book Kumar, Ranjit (2014) Research Methodology, 4th edition, Sage, ISBN 978-1-4462-6997-8 (pbk.), ISBN 978-1-4462-6996-1
Exercise I, 109-117
From the book Kumar, Ranjit (2014) Research Methodology, 4th edition, Sage, ISBN 978-1-4462-6997-8 (pbk.), ISBN 978-1-4462-6996-1
Exercise II, pages 163-166