The next 40 years in space: Selected papers presented at the 40th congress of the International Astronautical Federation, Torremolinos/Malaga, Spain, 7 - 13 October 1989. Pergamon Press.
Chicago Style (17th ed.) CitationThe Next 40 Years in Space: Selected Papers Presented at the 40th Congress of the International Astronautical Federation, Torremolinos/Malaga, Spain, 7 - 13 October 1989. Oxford u.a: Pergamon Press.
MLA (9th ed.) CitationThe Next 40 Years in Space: Selected Papers Presented at the 40th Congress of the International Astronautical Federation, Torremolinos/Malaga, Spain, 7 - 13 October 1989. Pergamon Press.
Warning: These citations may not always be 100% accurate.