Piet, J. H., & Ayodhya Prasad. (2000). Encyclopaedia of ethics and logic: Formal logic. Cosmo Publications.
シカゴスタイル引用形Piet, John H., , Ayodhya Prasad. Encyclopaedia of Ethics and Logic: Formal Logic. New Delhi: Cosmo Publications, 2000.
MLA引用形式Piet, John H., , Ayodhya Prasad. Encyclopaedia of Ethics and Logic: Formal Logic. Cosmo Publications, 2000.
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