Enzer, S. (1969). Some commercial and industrial aspects of the space program. Institute for the Future.
芝加哥风格引文Enzer, Selwyn. Some Commercial and Industrial Aspects of the Space Program. Middletown, Conn.: Institute for the Future, 1969.
MLA引文Enzer, Selwyn. Some Commercial and Industrial Aspects of the Space Program. Institute for the Future, 1969.
警告：这些引文格式不一定是100％准确.