Armstrong, D. (1973). Belief, truth and knowledge. C.U.Pr..
Tohutoru Kātū Chicago (17th ed.)Armstrong, D.M. Belief, Truth and Knowledge. Cambridge: C.U.Pr., 1973.
Tohutoro MLA (9th ed.)Armstrong, D.M. Belief, Truth and Knowledge. C.U.Pr., 1973.
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