若一作者有多篇你想引用的文献，只需用逗号来区隔作品的发表年份（最早到最晚依序排列）。若多篇文献在同一年内发表，请在年份后面加上a、b、c……等标注。（按：abc的使用需与参考文献部分有所对应，而这些文献的编排以标题名称的字母来决定。） The necessity of health and basic safety at do the job can't be overstated. The employer has each a ethical and a lawful obligation to make sure that his worker... https://privatebookmark.com/story13999547/a-simple-key-for-essay%E4%BB%A3%E5%86%99%E6%8E%A8%E8%8D%90-unveiled