Intergovernmental Bureau for Informatics., International Symposium on Economics of Informatics,, Frielink, A., & International Computation Center. (1975). Economics of informatics: Proceedings of the IBI-ICC international symposium, Mainz, 16-20 September, 1974. Amsterdam : New York: North-Holland Pub. Co..
Παραπομπή Chicago StyleIntergovernmental Bureau for Informatics., International Symposium on Economics of Informatics, A.B Frielink, and International Computation Center. Economics of Informatics: Proceedings of the IBI-ICC International Symposium, Mainz, 16-20 September, 1974. Amsterdam : New York: North-Holland Pub. Co., 1975.
Παραπομπή MLAIntergovernmental Bureau for Informatics., International Symposium on Economics of Informatics, A.B Frielink, and International Computation Center. Economics of Informatics: Proceedings of the IBI-ICC International Symposium, Mainz, 16-20 September, 1974. Amsterdam : New York: North-Holland Pub. Co., 1975.