Cita APA (7th ed.)
(1959). Carnegie Series in American education. Mc Graw-Hill.
Cita Chicago (17th ed.)
Carnegie Series in American Education. New York [usw.]: Mc Graw-Hill, 1959.
Cita MLA (9th ed.)
Carnegie Series in American Education. Mc Graw-Hill, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.