Lua APA (7ú heag.)
Walczuk, A., & Witalisz, W. (2014). Old Challenges and New Horizons in English and American Studies. Peter Lang GmbH.
Lua i Stíl Chicago (17ú heag.)
Walczuk, A., agus Władysław Witalisz. Old Challenges and New Horizons in English and American Studies. Frankfurt am Main, [Germany] ; Bern, [Switzerland]: Peter Lang GmbH, 2014.
Lua MLA (9ú heag.)
Walczuk, A., agus Władysław Witalisz. Old Challenges and New Horizons in English and American Studies. Peter Lang GmbH, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.