Παραπομπή APA
Proceedings of the XXVIth International Astronautical Congress Lisbon, 2. S. 1., & Napolitano, L. G. (1977). Space and energy. Oxford: Pergamon Press.
Παραπομπή Chicago StyleProceedings of the XXVIth International Astronautical Congress Lisbon, 21-27 September 1975., and L. G. Napolitano. Space and Energy. Oxford: Pergamon Press, 1977.
Παραπομπή MLAProceedings of the XXVIth International Astronautical Congress Lisbon, 21-27 September 1975., and L. G. Napolitano. Space and Energy. Oxford: Pergamon Press, 1977.
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