1. The Practice of Social Research;Babbie,1998
2. Research Design: Qualitative, Quantitative, and Mixed Methods Approaches;Creswell,2003
3. Meaning in method: the rhetoric of quantitative and qualitative research;Firestone;Educ. Res.,1987
4. Disciplinary Discourses: Social Interactions in Academic Writing;Hyland,2004
5. Metadiscourse;Hyland,2005