APA (7th ed.) Zitazioa
Gambrill, E. D., & Gibbs, L. E. (2009). Critical thinking for helping professionals: A skills-based workbook (3rd. ed.). Oxford University.
Chicago Style (17th ed.) Zitazioa
Gambrill, Eileen D., eta Leonard E. Gibbs. Critical Thinking for Helping Professionals: A Skills-based Workbook. 3rd. ed. Oxford, [England] ; New York: Oxford University, 2009.
MLA (9th ed.) Zitazioa
Gambrill, Eileen D., eta Leonard E. Gibbs. Critical Thinking for Helping Professionals: A Skills-based Workbook. 3rd. ed. Oxford University, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.