Świątek, A. (2014). Order of the Acquisition of the English Article System by Polish Learners in Different Proficiency Groups. Cambridge Scholars Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Świątek, Artur. Order of the Acquisition of the English Article System by Polish Learners in Different Proficiency Groups. Cambridge Scholars Publishing, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.