Unknown. (2023). Progress report on forest administration in the North-West Frontier Province for the year ending 31st March 1939. Forest Research Institute.
芝加哥风格引文Unknown. Progress Report on Forest Administration in the North-West Frontier Province for the Year Ending 31st March 1939. Forest Research Institute, 2023.
MLA引文Unknown. Progress Report on Forest Administration in the North-West Frontier Province for the Year Ending 31st March 1939. Forest Research Institute, 2023.
警告：这些引文格式不一定是100％准确.