Norman, M. J. T. (1979). Annual cropping systems in the tropics: An introduction. University Presses of Florida.
芝加哥风格引文Norman, M. J. T. Annual Cropping Systems in the Tropics: An Introduction. Gainesville: University Presses of Florida, 1979.
MLA引文Norman, M. J. T. Annual Cropping Systems in the Tropics: An Introduction. University Presses of Florida, 1979.
警告：这些引文格式不一定是100％准确.