Ward, B., Runnalls, J. D., & D'Anjou, L. (1971). The Widening gap: development in the 1970's: A report on the Columbia Conference on International Economic Development, Williamsburg, Virginia, and New York, February 15-21, 1970. Columbia University Press.
芝加哥风格引文Ward, Barbara, J. D. Runnalls, 与 Lenore D'Anjou. The Widening Gap: Development in the 1970's: A Report on the Columbia Conference on International Economic Development, Williamsburg, Virginia, and New York, February 15-21, 1970. New York: Columbia University Press, 1971.
MLA引文Ward, Barbara, et al. The Widening Gap: Development in the 1970's: A Report on the Columbia Conference on International Economic Development, Williamsburg, Virginia, and New York, February 15-21, 1970. Columbia University Press, 1971.