Howell, D., & Raison, T. (1961). Principles in practice: A series of Bow Group essays for the 1960s. Conservative Political Centre on behalf of the Bow Group.
芝加哥风格引文Howell, David, 与 Timothy Raison. Principles in Practice: A Series of Bow Group Essays for the 1960s. London: Conservative Political Centre on behalf of the Bow Group, 1961.
MLA引文Howell, David, 与 Timothy Raison. Principles in Practice: A Series of Bow Group Essays for the 1960s. Conservative Political Centre on behalf of the Bow Group, 1961.
警告：这些引文格式不一定是100％准确.