Erwin, E. (1970). The Concept of Meaninglessness. Johns Hopkins Press.
Tohutoru Kātū Chicago (17th ed.)Erwin, Edward. The Concept of Meaninglessness. Baltimore: Johns Hopkins Press, 1970.
Tohutoro MLA (9th ed.)Erwin, Edward. The Concept of Meaninglessness. Johns Hopkins Press, 1970.
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