European HP1000 Users Conference Noordwijkerhout, Netherlands, Beekman, M., Putten, A. v., & Zuidema, P. (1981). HP1000 computer trends: Proceedings of the First European HP1000 Users Conference, April 7-8, 1981, Noordwijkerhout, the Netherlands. Reedbooks.
Cita Chicago (17th ed.)European HP1000 Users Conference Noordwijkerhout, Netherlands, Matthijs Beekman, Albert van Putten, i Peter Zuidema. HP1000 Computer Trends: Proceedings of the First European HP1000 Users Conference, April 7-8, 1981, Noordwijkerhout, the Netherlands. Chertsey: Reedbooks, 1981.
Cita MLA (8th ed.)European HP1000 Users Conference Noordwijkerhout, Netherlands, et al. HP1000 Computer Trends: Proceedings of the First European HP1000 Users Conference, April 7-8, 1981, Noordwijkerhout, the Netherlands. Reedbooks, 1981.