1. Abelen, E., Redeker, G., & Thompson, S. A. (1993). The rhetorical structure of US-American and Dutch fund-raising letters. Text-Interdisciplinary Journal of the Study of Discourse, 13(3), 323–350.
2. Altenberg, B., & Tapper, M. (1998). The use of adverbial connectors in advanced Swedish learners’ written English. In S. Granger (Ed.), Learner English on computer (pp. 80–93). Longman.
3. Brown, G., & Yule, G. (1983). Discourse analysis. Cambridge University Press.
4. Bublitz, W. (1999). Introduction: Views of coherence. In W. Bublitz, U. Lenk, & E. Ventola (Eds.), Coherence in spoken and written discourse. How to create it and how to describe it. Selected papers from the international workshop on coherence, Augsburg, 24–27 April 1997 (pp. 1–10). John Benjamins.
5. Bundesministerium für Bildung, Wissenschaft und Forschung. (2019). Assessment scale B2. Retrieved from https://www.matura.gv.at/fileadmin/user_upload/downloads/Begleitmaterial/LFS/srdp_lfs_assessment_scale_b2.pdf