Howell, A. R. (1974). Study of the exposure to noise of operators of mechanical logging equipment in British Columbia. Canadian Forestry Service, Department of Environment.
芝加哥风格引文Howell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Ottawa: Canadian Forestry Service, Department of Environment, 1974.
MLA引文Howell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Canadian Forestry Service, Department of Environment, 1974.
警告：这些引文格式不一定是100％准确.
