Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

Howell, David, i 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.

Cita MLA (8th ed.)

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