Cita APA (7a ed.)

Singleton, A., & Cooper, A. (1981). The role of subscription agents. University of Leicester, Primary Comunications Research Centre.

Cita Chicago Style (17a ed.)

Singleton, Alan, y Alan Cooper. The Role of Subscription Agents. Leicester: University of Leicester, Primary Comunications Research Centre, 1981.

Cita MLA (9a ed.)

Singleton, Alan, y Alan Cooper. The Role of Subscription Agents. University of Leicester, Primary Comunications Research Centre, 1981.