Levitt, K. L., & Wharf, B. (1985). The Challenge of child welfare. University of British Columbia Press.
芝加哥风格引文Levitt, Kenneth L., 与 Brian Wharf. The Challenge of Child Welfare. Vancouver: University of British Columbia Press, 1985.
MLA引文Levitt, Kenneth L., 与 Brian Wharf. The Challenge of Child Welfare. University of British Columbia Press, 1985.
警告：这些引文格式不一定是100％准确.