Richter, E. (1988). English in higher education and scientific work. Verlag Enzyklopädie.
Lua i Stíl Chicago (17ú heag.)Richter, Ernst-Joachim. English in Higher Education and Scientific Work. Leipzig: Verlag Enzyklopädie, 1988.
Lua MLA (8ú heag.)Richter, Ernst-Joachim. English in Higher Education and Scientific Work. Verlag Enzyklopädie, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.