MORRIS LANGDON. (2006). PERMANENT INNOVATION. INNOVATION ACA.
Cita Chicago (17th ed.)MORRIS LANGDON. PERMANENT INNOVATION. WALNUT CREEK; USA: INNOVATION ACA, 2006.
Cita MLA (9th ed.)MORRIS LANGDON. PERMANENT INNOVATION. INNOVATION ACA, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.