Johnston, F. S. (1968). The logic of relationship. Philosophical Library.
Chicago Style aipamenaJohnston, Frederick S. The Logic of Relationship. New York: Philosophical Library, 1968.
MLA aipamenaJohnston, Frederick S. The Logic of Relationship. Philosophical Library, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.