Culpeper, Jonathan, et al., editors. English Language: Description, Variation and Context. Second edition, Palgrave, 2018, http://www.vlebooks.com/vleweb/product/openreader?id=LeicesterU&isbn=9781137571854.
Culpeper, Jonathan. English Language: Description, Variation and Context. Palgrave Macmillan, 2009.
Merrison, Andrew, et al. Introducing Language in Use: A Coursebook. Second Edition, Routledge, Taylor & Francis Group, 2014.
Merrison, Andrew John, et al. Introducing Language in Use: A Course Book. 2nd ed, Taylor and Francis, 2013, http://ebookcentral.proquest.com/lib/leicester/detail.action?docID=1582671.
