Barron, D. W. (1968). Recursive techniques in programming. Elsevier.
Cita Chicago (17th ed.)Barron, David William. Recursive Techniques in Programming. New York: Elsevier, 1968.
Cita MLA (9th ed.)Barron, David William. Recursive Techniques in Programming. Elsevier, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.