Ruggiero, V. R. (1996). Becoming a critical thinker (2nd ed.). College Survival.
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Chicago-čujuhus (17. p.)
Ruggiero, Vincent Ryan. Becoming a Critical Thinker. 2nd ed. Rapid City, SD: College Survival, 1996.
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MLA-čujuhus (9. p.)
Ruggiero, Vincent Ryan. Becoming a Critical Thinker. 2nd ed. College Survival, 1996.
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