Barker, R. C. (1988). The power of decision. Dood Mead.
Cita Chicago (17th ed.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
Cita MLA (9th ed.)Barker, Raymond Charles. The Power of Decision. Dood Mead, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.