(1987). About respiratory protection at work. Channing L. Bete Co..
芝加哥风格引文About Respiratory Protection at Work. South Deerfield, Mass.: Channing L. Bete Co., 1987.
MLA引文About Respiratory Protection at Work. Channing L. Bete Co., 1987.
警告：这些引文格式不一定是100％准确.