Dyfyniad APA
Gambrill, E. D., & Gibbs, L. E. (2009). Critical thinking for helping professionals: A skills-based workbook (3rd. ed.). Oxford University.
Dyfyniad Arddull Chicago
Gambrill, Eileen D., and Leonard E. Gibbs. Critical Thinking for Helping Professionals: A Skills-based Workbook. 3rd. ed. Oxford, [England] ; New York: Oxford University, 2009.
Dyfyniad MLA
Gambrill, Eileen D., and Leonard E. Gibbs. Critical Thinking for Helping Professionals: A Skills-based Workbook. 3rd. ed. Oxford University, 2009.
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