APA (7th ed.) Citation

European Space Agency, Reinhard, R., & Battrick, B. (1986). Space missions to Halley's comet. European Space Agency.

Chicago Style (17th ed.) Citation

European Space Agency, R. Reinhard, and B. Battrick. Space Missions to Halley's Comet. Noordwijk, the Netherlands: European Space Agency, 1986.

MLA (8th ed.) Citation

European Space Agency, et al. Space Missions to Halley's Comet. European Space Agency, 1986.