Cita APA (7th ed.)
Clark, G. H. (1985). Logic. Trinity Foundation.
Cita Chicago (17th ed.)
Clark, Gordon H. Logic. Jefferson, Maryland: Trinity Foundation, 1985.
Cita MLA (9th ed.)
Clark, Gordon H. Logic. Trinity Foundation, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.