Sendov, B., & Stanchev, I. (1988). Children in the information age: Opportunities for creativity, innovation, and new activities : selected papers from the second international conference, Sofia, Bulgaria, 19-23 May 1987. Pergamon Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Sendov, Blagovest, και Ivan Stanchev. Children in the Information Age: Opportunities for Creativity, Innovation, and New Activities : Selected Papers from the Second International Conference, Sofia, Bulgaria, 19-23 May 1987. Oxford, England ; New York: Pergamon Press, 1988.
Παραπομπή σε μορφή MLA (9th εκδ.)Sendov, Blagovest, και Ivan Stanchev. Children in the Information Age: Opportunities for Creativity, Innovation, and New Activities : Selected Papers from the Second International Conference, Sofia, Bulgaria, 19-23 May 1987. Pergamon Press, 1988.