Cita APA (7th ed.)
G. B. jr, T. (1963). Limits. Addison - Wesley Publishing Company, Inc..
Cita Chicago (17th ed.)
G. B. jr, Thomas. Limits. Massachusetts: Addison - Wesley Publishing Company, Inc., 1963.
Cita MLA (9th ed.)
G. B. jr, Thomas. Limits. Addison - Wesley Publishing Company, Inc., 1963.
Atenció: Aquestes cites poden no estar 100% correctes.