Cita APA (7th ed.)

Forbes, G. (1985). The metaphysics of modality. Clarendon Pr..

Cita Chicago (17th ed.)

Forbes, Graeme. The Metaphysics of Modality. Oxford: Clarendon Pr., 1985.

Cita MLA (9th ed.)

Forbes, Graeme. The Metaphysics of Modality. Clarendon Pr., 1985.