Friedman, B. D. (1999). Ecological perspectives cookbook: Recipes for social workers. Pacific Grove: Brooks/Cole Publishing.
استشهاد بنمط شيكاغوFriedman, Bruce D. Ecological Perspectives Cookbook: Recipes for Social Workers. Pacific Grove: Brooks/Cole Publishing, 1999.
MLA استشهادFriedman, Bruce D. Ecological Perspectives Cookbook: Recipes for Social Workers. Pacific Grove: Brooks/Cole Publishing, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.