Sommerhalder, R., & Westrhenen, S. C. v. (1988). The theory of computability: Programs, machines, effectiveness and feasibility (Printing.). Addison-Wesley Publishing.
Chicago-Zitierstil (17. Ausg.)Sommerhalder, Rudolph, und S. Christian van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness and Feasibility. Printing. Wokingham: Addison-Wesley Publishing, 1988.
MLA-Zitierstil (9. Ausg.)Sommerhalder, Rudolph, und S. Christian van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness and Feasibility. Printing. Addison-Wesley Publishing, 1988.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.