Perrin, J. P., Denouette, M., & Daclin, E. (1972). Switching machines. Reidel.
Lua i Stíl Chicago (17ú heag.)Perrin, J. P., M. Denouette, agus E. Daclin. Switching Machines. Dordrecht,: Reidel, 1972.
Lua MLA (8ú heag.)Perrin, J. P., et al. Switching Machines. Reidel, 1972.
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