Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.