Ruggiero, V. R. (2015). Becoming a critical thinker (Eighth edition.). Cengage Learning.
Cita Chicago (17th ed.)Ruggiero, Vincent Ryan. Becoming a Critical Thinker. Eighth edition. Stamford, Connecticut: Cengage Learning, 2015.
Cita MLA (9th ed.)Ruggiero, Vincent Ryan. Becoming a Critical Thinker. Eighth edition. Cengage Learning, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.