Mix lemon juice, vinegar, lemon peel, oregano, and onion. Pour over chicken, cover, and marinate in refrigerator for several hours or overnight, turning occasionally.
Preheat oven to 325 °F. Sprinkle the marinated chicken with salt, black pepper, and paprika.
Cover and bake for 30 minutes. Uncover and bake for 30 minutes more or until done.