Lessing, E. (1969). Discoverers of space: A pictorial narration. Burns & Oates; Herder and Herder.
芝加哥风格引文Lessing, Erich. Discoverers of Space: A Pictorial Narration. London, New York: Burns & Oates; Herder and Herder, 1969.
MLA引文Lessing, Erich. Discoverers of Space: A Pictorial Narration. Burns & Oates; Herder and Herder, 1969.
警告：这些引文格式不一定是100％准确.