APA引文

Bull, G. M., & Packham, S. (1971). Time sharing systems. McGraw-Hill.

Chicago Edition Citation

Bull, G M., and SFG Packham. Time Sharing Systems. London: McGraw-Hill, 1971.

MLA引文

Bull, G M., and SFG Packham. Time Sharing Systems. McGraw-Hill, 1971.

警告：這些引文格式不一定是100％准確.