Swales, M., & Swales, E. (1984). Adalbert Stifter: A critical study. Univ. Press.
Lua i Stíl Chicago (17ú heag.)Swales, Martin, agus Erika Swales. Adalbert Stifter: A Critical Study. Cambridge [u.a.]: Univ. Press, 1984.
Lua MLA (8ú heag.)Swales, Martin, agus Erika Swales. Adalbert Stifter: A Critical Study. Univ. Press, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.