Denzin, N. K., & Lincoln, Y. S. (2008). Introduction: The discipline and practice of qualitative research. In The landscape of qualitative research edited by Norman K.
Denzin, Yvonna S. Lincoln (3rd ed.). Thousand Oaks, CA: Sage Publications.
I understand that you are struggling to access materials. However, many important researchers now make copies of their work available on various websites. For example, I conducted a search on Google Scholar for "English for research publication purposes". The first three items, Flowerdew (2013, 2015) and Moreno (2010) are all available to download as PDF and are well worth reading as an introduction to the field.