European Space Agency, Reinhard, R., & Battrick, B. (1986). Space missions to Halley's comet. European Space Agency.
芝加哥风格引文European Space Agency, R. Reinhard, 与 B. Battrick. Space Missions to Halley's Comet. Noordwijk, the Netherlands: European Space Agency, 1986.
MLA引文European Space Agency, et al. Space Missions to Halley's Comet. European Space Agency, 1986.
警告：这些引文格式不一定是100％准确.