APA (7e ed.) Bronvermelding

Sanford, D. H. (1992). If P, then Q: Conditionals and the foundations of reasoning. Routledge.

Chicago (17e ed.) Bronvermelding

Sanford, David H. If P, Then Q: Conditionals and the Foundations of Reasoning. London: Routledge, 1992.

MLA (9e ed.) Bronvermelding

Sanford, David H. If P, Then Q: Conditionals and the Foundations of Reasoning. Routledge, 1992.