International Astronomical Union. Symposium, Weinberger, R., & Acker, A. (1993). Planetary nebulae: Proceedings of the 155 Symposium of the International Astronomical Union, held in Innsbruck, Austria, July 13-17, 1992. Kluwer Academic.
Chicago Style (17th ed.) CitationInternational Astronomical Union. Symposium, R. Weinberger, and Agnès Acker. Planetary Nebulae: Proceedings of the 155 Symposium of the International Astronomical Union, Held in Innsbruck, Austria, July 13-17, 1992. Dordrecht ; Boston: Kluwer Academic, 1993.
MLA (9th ed.) CitationInternational Astronomical Union. Symposium, et al. Planetary Nebulae: Proceedings of the 155 Symposium of the International Astronomical Union, Held in Innsbruck, Austria, July 13-17, 1992. Kluwer Academic, 1993.
Warning: These citations may not always be 100% accurate.