Perez, E. J. (1970). Conceptual approach in the teaching of social studies in elementary school.
Chicago-referens (17:e uppl.)Perez, Efigenia J. Conceptual Approach in the Teaching of Social Studies in Elementary School. 1970.
MLA-referens (9:e uppl.)Perez, Efigenia J. Conceptual Approach in the Teaching of Social Studies in Elementary School. 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.