Gaya APA

Bassham, G, , . et al (2011). Critical Thinking: A Student's Introduction (4th Edition). United States of America: The McGraw-Hill Companies, Inc..

Gaya MLA

Bassham, Gregory, , . et al. "Critical Thinking: A Student's Introduction". 4th Edition United States of America: The McGraw-Hill Companies, Inc., 2011. Text.