(1970). Principles of computer-assisted instruction systems / [by] Leonard C. Silvern.
芝加哥风格引文Principles of Computer-assisted Instruction Systems / [by] Leonard C. Silvern. 1970.
MLA引文Principles of Computer-assisted Instruction Systems / [by] Leonard C. Silvern. 1970.
警告：这些引文格式不一定是100％准确.