APA (7th ed.) Citation

Forbes, G. (1989). Languages of possibility: An essay in philosophical logic. Blackwell.

Chicago Style (17th ed.) Citation

Forbes, Graeme. Languages of Possibility: An Essay in Philosophical Logic. Oxford, UK: Blackwell, 1989.

MLA (9th ed.) Citation

Forbes, Graeme. Languages of Possibility: An Essay in Philosophical Logic. Blackwell, 1989.

Warning: These citations may not always be 100% accurate.