Cita APA (7th ed.)
Hill, J. P. (1970). Minnesota symposia on child psychology.
Cita Chicago (17th ed.)
Hill, John P. Minnesota Symposia on Child Psychology. 1970.
Cita MLA (9th ed.)
Hill, John P. Minnesota Symposia on Child Psychology. 1970.
Atenció: Aquestes cites poden no estar 100% correctes.