APA (7 वां संस्करण) प्रशस्ति पत्र

Doyle, R. E. (1992). Essential skills and strategies in the helping process. Brooks/Cole Pub. Co.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Doyle, Robert E. Essential Skills and Strategies in the Helping Process. Pacific Grove, California: Brooks/Cole Pub. Co, 1992.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Doyle, Robert E. Essential Skills and Strategies in the Helping Process. Brooks/Cole Pub. Co, 1992.