Cita APA (7th ed.)
(1968). The great ideas today 1968. William Benton.
Cita Chicago (17th ed.)
The Great Ideas Today 1968. Chicago: William Benton, 1968.
Cita MLA (9th ed.)
The Great Ideas Today 1968. William Benton, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.