International Network Planning Symposium Palma de Mallorca, Spain, Compañía Telefónica Nacional de España, & Lada, L. (1989). Network planning in the 1990's: Proceedings of the Fourth International Network Planning Symposium held in Palma de Mallorca, Spain, 17-22 September, 1989. North-Holland ; Distributors for the U.S. and Canada, Elsevier Science Pub. Co..
Cita Chicago (17th ed.)International Network Planning Symposium Palma de Mallorca, Spain, Compañía Telefónica Nacional de España, i Luis Lada. Network Planning in the 1990's: Proceedings of the Fourth International Network Planning Symposium Held in Palma De Mallorca, Spain, 17-22 September, 1989. Amsterdam ; New York : New York, N.Y., U.S.A.: North-Holland ; Distributors for the U.S. and Canada, Elsevier Science Pub. Co., 1989.
Cita MLA (8th ed.)International Network Planning Symposium Palma de Mallorca, Spain, et al. Network Planning in the 1990's: Proceedings of the Fourth International Network Planning Symposium Held in Palma De Mallorca, Spain, 17-22 September, 1989. North-Holland ; Distributors for the U.S. and Canada, Elsevier Science Pub. Co., 1989.