Ravinarayan, C., & Bhaskaran Nair, P. (2015). Portfolio assessment in the context of English language teaching and training: A critical analysis of present practices and future prospects (PHd thesis). Kannur UNiversity.

Ravinarayan, C., and P. Bhaskaran Nair. Portfolio Assessment in the Context of English Language Teaching and Training: A Critical Analysis of Present Practices and Future Prospects (PHd Thesis). Kannur: Kannur UNiversity, 2015.

Ravinarayan, C., and P. Bhaskaran Nair. Portfolio Assessment in the Context of English Language Teaching and Training: A Critical Analysis of Present Practices and Future Prospects (PHd Thesis). Kannur UNiversity, 2015.