APA (7th ed.) Citation

Barron, D. W. (1968). Recursive techniques in programming. Elsevier.

Chicago Style (17th ed.) Citation

Barron, David William. Recursive Techniques in Programming. New York: Elsevier, 1968.

MLA (9th ed.) Citation

Barron, David William. Recursive Techniques in Programming. Elsevier, 1968.