Cita APA (7th ed.)
Hill, W. (1963). Unit planning and teaching in elementary social studies.
Cita Chicago (17th ed.)
Hill, Wilhelmina. Unit Planning and Teaching in Elementary Social Studies. 1963.
Cita MLA (9th ed.)
Hill, Wilhelmina. Unit Planning and Teaching in Elementary Social Studies. 1963.
Atenció: Aquestes cites poden no estar 100% correctes.