APA (7th ed.) Zitazioa

Wolfram, S. (1989). Philosophical logic: An introduction. Routledge.

Chicago Style (17th ed.) Zitazioa

Wolfram, Sybil. Philosophical Logic: An Introduction. London: Routledge, 1989.

MLA (9th ed.) Zitazioa

Wolfram, Sybil. Philosophical Logic: An Introduction. Routledge, 1989.