Doyle, R. E. (1998). Essential skills and strategies in the helping process: Robert E. Doyle. Pacific Grove, Calif: Brooks/Cole.
استشهاد بنمط شيكاغوDoyle, Robert E. Essential Skills and Strategies in the Helping Process: Robert E. Doyle. Pacific Grove, Calif: Brooks/Cole, 1998.
MLA استشهادDoyle, Robert E. Essential Skills and Strategies in the Helping Process: Robert E. Doyle. Pacific Grove, Calif: Brooks/Cole, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.