Gulvin, J. (2000). The covenant. Orion.
Cita Chicago (17th ed.)Gulvin, Jeff. The Covenant. London: Orion, 2000.
Cita MLA (8th ed.)Gulvin, Jeff. The Covenant. Orion, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)