Unknown. (2023). Progress Report of the Northern Forest Rangers College, Dehradun for the year 1956-57. Forest Research Institute, Dehradun.
芝加哥风格引文Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
MLA引文Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
警告：这些引文格式不一定是100％准确.