Tohutoro APA (7th ed.)
Hughes, G. E., & Cresswell, M. J. (1996). A new introduction to modal logic. Routledge.
Tohutoru Kātū Chicago (17th ed.)
Hughes, G. E., me M. J. Cresswell. A New Introduction to Modal Logic. London ; New York: Routledge, 1996.
Tohutoro MLA (9th ed.)
Hughes, G. E., me M. J. Cresswell. A New Introduction to Modal Logic. Routledge, 1996.
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