둘이 구별이 안돼요ㅠㅠ장자가 한 말인가?하여 보면 노자가 한 말이고, 노자의 도덕경인가?싶어 보면 제물론 발췌고ㅠㅠ

윤리 과목 하는데,둘이 너무 헷갈리네요.확실히 도'에 관해 구별할 방법 없을까요?