1. The communicative competence of Chinese seafarers and their employability in the international maritime labour market
2. Standardised English Language Proficiency Testing for Seafarers
3. Common European Framework of Reference for Languages (CEFR) https://www.coe.int/en/web/common-european-framework-reference-languages/table-1-cefr-3.3-common-reference-levels-global-scale Accessed 10.06.21
4. International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW) https://www.imo.org/en/OurWork/HumanElement/Pages/STCW-Conv-LINK.aspx Accessed 10.06.21
5. B.E. Kitaevich, M.N. Sergeeva, L.I. Kaminskaja and S.N. Vohmjanin, Uchebnik anglijskogo jazyka dlja morjakov (Lan, 2020).