ebrary, Inc, Welna, J., Esquibel, J., & Wojtys, A. (2012). Explorations in the English language: Middle Ages and beyond : Festschrift for Professor Jerzy Welna on the occasion of his 70th birthday. Peter Lang.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, Jerzy Welna, Joanna Esquibel, و Anna Wojtys. Explorations in the English Language: Middle Ages and Beyond : Festschrift for Professor Jerzy Welna on the Occasion of His 70th Birthday. Frankfurt am Main: Peter Lang, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, et al. Explorations in the English Language: Middle Ages and Beyond : Festschrift for Professor Jerzy Welna on the Occasion of His 70th Birthday. Peter Lang, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.