Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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