Friedman. Human Spaceflight. University of Arizona Press.
芝加哥风格引文Friedman. Human Spaceflight. University of Arizona Press.
MLA引文Friedman. Human Spaceflight. University of Arizona Press.
警告：这些引文格式不一定是100％准确.
APA引文
Friedman. Human Spaceflight. University of Arizona Press.
芝加哥风格引文Friedman. Human Spaceflight. University of Arizona Press.
MLA引文Friedman. Human Spaceflight. University of Arizona Press.