Inheritance attributes using abstract class

Question

I’m looking to use inheritance with parent class being abstract. The point is that I’m using the toString() superscript so that each print of child classes can print their respective data. But when I use "this" within toString on the attributes it shows me that: String pessoas.Pessoa.nome. When I access, there will be a difference between Professor and another Employee, such as Administrator.

package pessoas;

public abstract class Pessoa {

    protected String nome;
    protected String matricula;
    protected String cpf;

    @Override
    public abstract String toString();

    //getters e setters

}

package pessoas;

import rh.Funcionario;

public class Professor extends Pessoa implements Funcionario{

    @Override
    public String toString() {
        return this.nome + this.cpf + this.matricula;
    }

    @Override
    public Double salario() {
        // TODO Auto-generated method stub
        return null;
    }
}