National Institute for Occupational Safety and Health. (1977). National occupational hazard survey volume 1: Survey manual. National Institute for Occupational Safety and Health.
芝加哥风格引文National Institute for Occupational Safety and Health. National Occupational Hazard Survey Volume 1: Survey Manual. Cincinnati, Ohio: National Institute for Occupational Safety and Health, 1977.
MLA引文National Institute for Occupational Safety and Health. National Occupational Hazard Survey Volume 1: Survey Manual. National Institute for Occupational Safety and Health, 1977.
警告：这些引文格式不一定是100％准确.