Izincwadi ezi-3 ezihamba phambili zeToni Hill
I-Psychology ibangela impumelelo enkulu kuhlobo olumnyama. Futhi umbhali uToni Hill usevele ushiye ukuqeqeshwa kwezemfundo mayelana nalokhu. Kungenzeka ukuthi sisondela eduze kombulali, isisulu esingahle sibe khona noma umphenyi, umbuzo ukuthi ungene kulokho kushayelwa ukwesaba, ukungakhululeki, ...