Raman, M. (1972). Productivity & economic Growth. National Productivity council.
芝加哥风格引文Raman, M. Productivity & Economic Growth. NULL: National Productivity council, 1972.
MLA引文Raman, M. Productivity & Economic Growth. National Productivity council, 1972.
警告：这些引文格式不一定是100％准确.