“Other Methods of Proof.” Logic: The Laws of Truth, by NICHOLAS J. J. SMITH, Princeton University Press, PRINCETON; OXFORD, 2012, pp. 385–437, www.jstor.org/stable/j.ctt7sr96.19. Accessed 27 Jan. 2021.
SMITH, N. (2012). Other Methods of Proof. In Logic: The Laws of Truth (pp. 385-437). PRINCETON; OXFORD: Princeton University Press. Retrieved January 27, 2021, from http://www.jstor.org/stable/j.ctt7sr96.19
SMITH, NICHOLAS J. J. "Other Methods of Proof." In Logic: The Laws of Truth, 385-437. PRINCETON; OXFORD: Princeton University Press, 2012. Accessed January 27, 2021. http://www.jstor.org/stable/j.ctt7sr96.19.
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