Cita APA (7a ed.)

Harden, I., Lewis, N., & Graham, C. (1992). The contracting state. Open University Press.

Cita Chicago Style (17a ed.)

Harden, Ian, Norman Lewis, y Cosmo Graham. The Contracting State. Buckingham [etc.]: Open University Press, 1992.

Cita MLA (9a ed.)

Harden, Ian, et al. The Contracting State. Open University Press, 1992.