ebrary, Inc. (2001). Third supplement to the fourth edition. National Academy Press.
Cita Chicago (17th ed.)ebrary, Inc. Third Supplement to the Fourth Edition. Washington, D.C.: National Academy Press, 2001.
Cita MLA (9th ed.)ebrary, Inc. Third Supplement to the Fourth Edition. National Academy Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.