Poulsen, J., J. Bang, C. Hansen, I. Westh, K. Schrøder, and A. Jerslev. “Indledning”. MedieKultur: Journal of Media and Communication Research, vol. 5, no. 11, Aug. 1989, p. 2 pages, doi:10.7146/mediekultur.v5i11.824.