Παραπομπή σε μορφή APA (7η εκδ.)

Winfield, R. D. (2006). From concept to objectivity: Thinking through Helel's subjective logic. Ashgate.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Winfield, Richard Dien. From Concept to Objectivity: Thinking Through Helel's Subjective Logic. Aldershot: Ashgate, 2006.

Παραπομπή σε μορφή MLA (8th εκδ.)

Winfield, Richard Dien. From Concept to Objectivity: Thinking Through Helel's Subjective Logic. Ashgate, 2006.