books
Cook, V (2008) Second Language Learning and Language Teaching. (4th rev ed). Hodder Education
Ellis, R & Widdowson, H (1997) Second Language Acquisition. OUP, Oxford.
Kramsch, C (1993) Context and Culture in Language Teaching. Oxford University Press.
Richards, J & Rodgers, T (2001) Approaches and Methods in Language Teaching. CUP, Cambridge.
Williams, M & Burden, R (1997) Psychology for Language Teachers: A social constructivist approach. CUP, Cambridge.
Yule, G (2010) The Study of Language (4th ed). CUP, Cambridge.
articles
Canale, M.; Swain, M. (1980). "Theoretical bases of communicative approaches to second language teaching and testing". Applied Linguistics (1): 1-47.
https://segue.atlas.uiuc.edu/uploads/nppm/CanaleSwain.80.pdf
Florence Myles: "Second language acquisition (SLA) research: its significance for learning and teaching issues"
LLAS Good practice guide: http://www.llas.ac.uk/resources/gpg/421