APA-čujuhus (7. p.)
Sommerhalder, R., & Westrhenen, S. v. (1988). The Theory of Computability: Programs, Machines, Effectiveness and Feasibility.
Chicago-čujuhus (17. p.)
Sommerhalder, R., juo S.C. van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness and Feasibility. 1988.
MLA-čujuhus (9. p.)
Sommerhalder, R., juo S.C. van Westrhenen. The Theory of Computability: Programs, Machines, Effectiveness and Feasibility. 1988.
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