Ashby, N., Bartlett, D. F., & Wyss, W. (1990). General relativity and gravitation, 1989: Proceedings of the 12th International Conference on General Relativity and Gravitation, University of Colorado at Boulder, July 2-8, 1989. Cambridge University Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Ashby, Neil, David F. Bartlett, και W. Wyss. General Relativity and Gravitation, 1989: Proceedings of the 12th International Conference on General Relativity and Gravitation, University of Colorado at Boulder, July 2-8, 1989. Cambridge: Cambridge University Press, 1990.
Παραπομπή σε μορφή MLA (8th εκδ.)Ashby, Neil, et al. General Relativity and Gravitation, 1989: Proceedings of the 12th International Conference on General Relativity and Gravitation, University of Colorado at Boulder, July 2-8, 1989. Cambridge University Press, 1990.
