APA-viite (7. p.)
Ruggiero, V. R. (1996). Becoming a critical thinker (2nd.ed.). Houghton Mifflin.
Chicago-viite (17. p.)
Ruggiero, Vincent Ryan. Becoming a Critical Thinker. 2nd.ed. Rapid: Houghton Mifflin, 1996.
MLA-viite (9. p.)
Ruggiero, Vincent Ryan. Becoming a Critical Thinker. 2nd.ed. Houghton Mifflin, 1996.
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