Παραπομπή σε μορφή APA (7η εκδ.)

Sommerhalder, R., & Westrhenen, S. C. v. (1988). The theory of computability: Programs, machines, effectiveness, and feasibility. Addison-Wesley Pub. Co..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sommerhalder, R., και S. Christiaan van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness, and Feasibility. Wokingham, England ; Reading, Mass.: Addison-Wesley Pub. Co., 1988.

Παραπομπή σε μορφή MLA (8th εκδ.)

Sommerhalder, R., και S. Christiaan van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness, and Feasibility. Addison-Wesley Pub. Co., 1988.