Gaya APA

Elder, D, L. (2013). 30 Days to Better Thinking and Better Living Through Critical Thinking: A Guide for Improving Every Aspect of Your Life, Revised and Expanded . New Jersey: Pearson Education, Inc.

Gaya MLA

Elder, Dr., Linda. "30 Days to Better Thinking and Better Living Through Critical Thinking: A Guide for Improving Every Aspect of Your Life, Revised and Expanded". New Jersey: Pearson Education, Inc, 2013. Text.