International Astronomical Union General Assembly, Kontopoulos, G. I., & Jappel, A. (1974). Proceedings of the fifteenth General Assembly, Sydney 1973 and Extraordinary General Assembly, Poland 1973. Published by D. Reidel on behalf of IAU.
Chicago Style (17th ed.) CitationInternational Astronomical Union General Assembly, Geōrgios Iōannou Kontopoulos, and A. Jappel. Proceedings of the Fifteenth General Assembly, Sydney 1973 and Extraordinary General Assembly, Poland 1973. Boston, Ma.: Published by D. Reidel on behalf of IAU, 1974.
MLA (8th ed.) CitationInternational Astronomical Union General Assembly, et al. Proceedings of the Fifteenth General Assembly, Sydney 1973 and Extraordinary General Assembly, Poland 1973. Published by D. Reidel on behalf of IAU, 1974.
Warning: These citations may not always be 100% accurate.