Świątek, A. (2014). Order of the Acquisition of the English Article System by Polish Learners in Different Proficiency Groups. Cambridge Scholars Publishing.
Lua i Stíl Chicago (17ú heag.)Świątek, Artur. Order of the Acquisition of the English Article System by Polish Learners in Different Proficiency Groups. Newcastle upon Tyne, [United Kingdom]: Cambridge Scholars Publishing, 2014.
Lua MLA (9ú heag.)Świątek, Artur. Order of the Acquisition of the English Article System by Polish Learners in Different Proficiency Groups. Cambridge Scholars Publishing, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.