Davy, F. X., & Burkhart, R. E. (1970). Perspectives on our time: Issues and essays. Houghton Mifflin.
Tohutoru Kātū Chicago (17th ed.)Davy, Francis X., me Robert E. Burkhart. Perspectives on Our Time: Issues and Essays. Boston: Houghton Mifflin, 1970.
Tohutoro MLA (9th ed.)Davy, Francis X., me Robert E. Burkhart. Perspectives on Our Time: Issues and Essays. Houghton Mifflin, 1970.
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