Piet, J. H., & Ayodhya Prasad. (2000). Encyclopaedia of ethics and logic: Logic and mathematics. Cosmo Publications.
Dyfyniad Arddull ChicagoPiet, John H., and Ayodhya Prasad. Encyclopaedia of Ethics and Logic: Logic and Mathematics. New Delhi: Cosmo Publications, 2000.
Dyfyniad MLAPiet, John H., and Ayodhya Prasad. Encyclopaedia of Ethics and Logic: Logic and Mathematics. Cosmo Publications, 2000.
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