Nahin, P. Time travel in Einstein's universe [Books]. IEEE spectrum.
芝加哥风格引文Nahin, P.J. "Time Travel in Einstein's Universe [Books]." IEEE Spectrum .
MLA引文Nahin, P.J. "Time Travel in Einstein's Universe [Books]." IEEE Spectrum, .
警告：这些引文格式不一定是100％准确.