Phi Delta Kappa. EDge. Phi Delta Kappa International.
Cita Chicago (17th ed.)Phi Delta Kappa. EDge. Bloomington, Ind.: Phi Delta Kappa International.
Cita MLA (9th ed.)Phi Delta Kappa. EDge. Phi Delta Kappa International.
Atenció: Aquestes cites poden no estar 100% correctes.