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* Abdullah, R., & Hübner, R. (Eds.). (2005). Piktogramme und Icons: Pflicht oder Kür? (1. Aufl). Mainz: Schmidt. | * Abdullah, R., & Hübner, R. (Eds.). (2005). Piktogramme und Icons: Pflicht oder Kür? (1. Aufl). Mainz: Schmidt. | ||
* Everaert-Desmedt, N. (n.d.). Charles Sanders Peirce: Semiotics / Signo - Applied Semiotics Theories. Retrieved from http://www.signosemio.com/peirce/semiotics.asp | * Everaert-Desmedt, N. (n.d.). Charles Sanders Peirce: Semiotics / Signo - Applied Semiotics Theories. Retrieved from http://www.signosemio.com/peirce/semiotics.asp | ||
* Frutiger, A., & Bluhm, A. A. (1989). Signs and symbols: their design and meaning. London: Studio Editions. | |||
* Haldemann, J. (2014, November 11). A brief history of pictograms and ideograms - Saffron Interactive. Retrieved from http://saffroninteractive.com/a-brief-history-of-pictograms-and-ideograms/ | * Haldemann, J. (2014, November 11). A brief history of pictograms and ideograms - Saffron Interactive. Retrieved from http://saffroninteractive.com/a-brief-history-of-pictograms-and-ideograms/ | ||
* Hicks, J. (2011). The icon handbook. Penarth: Five Simple Steps. | * Hicks, J. (2011). The icon handbook. Penarth: Five Simple Steps. | ||