Howard, A. (1924). Crop-production in India: A critical survey of its problems. Oxford University Press.
芝加哥风格引文Howard, Albert. Crop-production in India: A Critical Survey of Its Problems. London: Oxford University Press, 1924.
MLA引文Howard, Albert. Crop-production in India: A Critical Survey of Its Problems. Oxford University Press, 1924.
警告：这些引文格式不一定是100％准确.