Barker, S. F. (1965). The Elements of Logic. Prentice-Hall.
Cita Chicago (17th ed.)Barker, Stephen F. The Elements of Logic. Englewood Cliffs, N.J.: Prentice-Hall, 1965.
Cita MLA (9th ed.)Barker, Stephen F. The Elements of Logic. Prentice-Hall, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.