pointer to stack object without onwership

I want have class with a pointer member variable. This pointer should point to an object which may be stack-allocated or heap allocated. However, this pointer should do not have any ownership. In other words, no delete should be called at all if the pointer go out of scope. I think that raw pointer could solve the problem... However, I am not sure if there is a better C++11 approach than raw pointers?

Example:

class foo{
public:
    bar* pntr
};

int main(){
    bar a;
    foo b;
    b.pntr=&a;
}