Kristensen, Leif. “Jean Umiker-Sebeok (red.): Marketing and Semiotics. New Directions in the Study of Signs for Sale”. MedieKultur: Journal of media and communication research 5, no. 10 (March 27, 1989): 4 pages. Accessed August 27, 2025. https://www.mediekultur.dk/article/view/814.