Lenz, R., Hafner, H., & Schmidt, D. (2006). Scientific analyses using the Continuing Vocational Training Survey 2000.
Lua i Stíl Chicago (17ú heag.)Lenz, Rainer, Hans-Peter Hafner, agus Daniel Schmidt. Scientific Analyses Using the Continuing Vocational Training Survey 2000. Düsseldorf, 2006.
Lua MLA (8ú heag.)Lenz, Rainer, et al. Scientific Analyses Using the Continuing Vocational Training Survey 2000. 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.