Rubin, R. (1989). Formal logic: A model of english. Mayfield Pub..
Cita Chicago (17th ed.)Rubin, Ronald. Formal Logic: A Model of English. Mountain View, Calif.: Mayfield Pub., 1989.
Cita MLA (9th ed.)Rubin, Ronald. Formal Logic: A Model of English. Mayfield Pub., 1989.
Atenció: Aquestes cites poden no estar 100% correctes.