The Norton utilities: Version 4.0 / Advanced edition user manual. s.n.].
芝加哥风格引文The Norton Utilities: Version 4.0 / Advanced Edition User Manual. [S.l: s.n.].
MLA引文The Norton Utilities: Version 4.0 / Advanced Edition User Manual. s.n.].
警告：这些引文格式不一定是100％准确.