FREER, J. R. (1990). COMPUTER COMMUNICATIONS AND NETWORKS. MCGRAW HILL.
芝加哥风格引文FREER, J R. COMPUTER COMMUNICATIONS AND NETWORKS. -: MCGRAW HILL, 1990.
MLA引文FREER, J R. COMPUTER COMMUNICATIONS AND NETWORKS. MCGRAW HILL, 1990.
警告：这些引文格式不一定是100％准确.
APA引文