Cita APA (7a ed.)
Erickson, F. (1979). On Standards of Descriptive Validity in Studies of Classroom Activity.
Cita estilo Chicago (17a ed.)
Erickson, Frederick. On Standards of Descriptive Validity in Studies of Classroom Activity. 1979.
Cita MLA (9a ed.)
Erickson, Frederick. On Standards of Descriptive Validity in Studies of Classroom Activity. 1979.
Precaución: Estas citas no son 100% exactas.