American Psychological Association 6th edition

Birgit Demuth, Heinrich Hussmann, Steffen Zschaler, Lothar Schmitz, & The Pennsylvania State University Cite Seer X Archives. (o. J.). Teaching OOT Using a Framework and Both Direct and Net-based Tutoring 1. http://www.st.inf.tu-dresden.de/files/papers/ED-MEDIA2001.Pdf.

ISO-690 (author-date, English)

BIRGIT DEMUTH, HEINRICH HUSSMANN, STEFFEN ZSCHALER, LOTHAR SCHMITZ und THE PENNSYLVANIA STATE UNIVERSITY CITESEERX ARCHIVES, [no date]. Teaching OOT Using a Framework and Both Direct and Net-based Tutoring 1. http://www.st.inf.tu-dresden.de/files/papers/ED-MEDIA2001.pdf.

Modern Language Association 9th edition

Birgit Demuth, Heinrich Hussmann, Steffen Zschaler, Lothar Schmitz, und The Pennsylvania State University Cite Seer X Archives. „Teaching OOT Using a Framework and Both Direct and Net-Based Tutoring 1“. http://www.st.inf.tu-dresden.de/files/papers/ED-MEDIA2001.Pdf.

Mohr Siebeck - Recht (Deutsch - Österreich)

Birgit Demuth/Heinrich Hussmann/Steffen Zschaler/Lothar Schmitz/The Pennsylvania State University Cite Seer X Archives: Teaching OOT Using a Framework and Both Direct and Net-based Tutoring 1, http://www.st.inf.tu-dresden.de/files/papers/ED-MEDIA2001.pdf

Emerald - Harvard

Birgit Demuth, Heinrich Hussmann, Steffen Zschaler, Lothar Schmitz und The Pennsylvania State University Cite Seer X Archives. (o. J.). „Teaching OOT Using a Framework and Both Direct and Net-based Tutoring 1“, http://www.st.inf.tu-dresden.de/files/papers/ED-MEDIA2001.Pdf.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.