توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Howell, David, و 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.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Howell, David, و Timothy Raison. Principles in Practice: A Series of Bow Group Essays for the 1960s. Conservative Political Centre on behalf of the Bow Group, 1961.