K. Nirmal Ravi Kumar. (2023). Objective Agricultural Economics . Daya Publishing , New Delhi.
芝加哥风格引文K. Nirmal Ravi Kumar. Objective Agricultural Economics . Daya Publishing , New Delhi, 2023.
MLA引文K. Nirmal Ravi Kumar. Objective Agricultural Economics . Daya Publishing , New Delhi, 2023.
警告：这些引文格式不一定是100％准确.