APA-Zitierstil (7. Ausg.)

Holmberg, B. (2003). Distance education in essence: An overview of theory and practice in the early twenty-first century (2. ed.). Bis.

Chicago-Zitierstil (17. Ausg.)

Holmberg, Börje. Distance Education in Essence: An Overview of Theory and Practice in the Early Twenty-first Century. 2. ed. Oldenburg: Bis, 2003.

MLA-Zitierstil (9. Ausg.)

Holmberg, Börje. Distance Education in Essence: An Overview of Theory and Practice in the Early Twenty-first Century. 2. ed. Bis, 2003.