Cita APA (7th ed.)

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.