APA-Zitierstil (7. Ausg.)

Holmberg, B. (2001). Distance education in essence: An overview of theory and practice in the early twenty-first century. Bis.

Chicago-Zitierstil (17. Ausg.)

Holmberg, Börje. Distance Education in Essence: An Overview of Theory and Practice in the Early Twenty-first Century. Oldenburg: Bis, 2001.

MLA-Zitierstil (9. Ausg.)

Holmberg, Börje. Distance Education in Essence: An Overview of Theory and Practice in the Early Twenty-first Century. Bis, 2001.