Παραπομπή APA

Vielberth, J. (2008). KOD system: Current stage of development. Institute for Development and Research.

Παραπομπή Chicago Style

Vielberth, Johann. KOD System: Current Stage of Development. Regensburg: Institute for Development and Research, 2008.

Παραπομπή MLA

Vielberth, Johann. KOD System: Current Stage of Development. Institute for Development and Research, 2008.