1. Bayyurt, Y. (2010). Author positioning in academic writing. In Zyngier, S. & Viana, V. (Eds),Avaliaçoes e perspectivas: mapeando os estudos empiricos na area deHumanas (Appraisals and perspectives: mapping empirical studies in the Humanities) 163-184. Rio de Janeiro: The Federal University of Rio de Janeiro.
2. Brown, P.and S. Levinson . (1987). Politeness. Some Universals in Language Use. Cambridge: CUP.
3. Bayraktaroğlu, A. (2001). Advice-giving in Turkish. Superiority or Solidarity. Linguistic Politeness Across Boundaries: The Case of Greek and Turkish. 177-208. Ed. by. Arın Bayraktaroğlu and Maria Sifianou. John Benjamins.
4. Channel, J. (1994). Vague language. Oxford: Oxford University Press.
5. Doyuran, Z. (2009). Conciliation of Knowledge through Hedging in Turkish Scientific Articles. Edebiyat Fakültesi Dergisi. Journal of Faculty of Letters, 26(1), 85-99.