Snyder, D. P. (1971). Modal logic and its applications. Van Nostrand Reinhold.
Cita Chicago Style (17a ed.)Snyder, D. Paul. Modal Logic and Its Applications. New York [etc.]: Van Nostrand Reinhold, 1971.
Cita MLA (9a ed.)Snyder, D. Paul. Modal Logic and Its Applications. Van Nostrand Reinhold, 1971.
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