The textbook: Wayne, Colomb & Booth: The Craft of Research
The texts on supermarkets and public space:
Henna's article, see post below on the blog.
Margaret Kohn: Brave New Neighbourhoods - Privatization of public space. (Google-book online)
Shopping Mall as Privately Owned Public Space. The Chinese University of Hong Kong School of Architecture. STEVEN HO 2009-2010 THESIS REPORT Link to google-search, download as pdf.