Halpern, R. (1988). Getting the most from WordPerfect. Osborne McGraw-Hill.
芝加哥风格引文Halpern, Ruth. Getting the Most from WordPerfect. Berkeley: Osborne McGraw-Hill, 1988.
MLA引文Halpern, Ruth. Getting the Most from WordPerfect. Osborne McGraw-Hill, 1988.
警告：这些引文格式不一定是100％准确.