Cita APA (7a ed.)
Tewksbury, J. L. (1967). Nongrading in the elementary school.
Cita estilo Chicago (17a ed.)
Tewksbury, John L. Nongrading in the Elementary School. 1967.
Cita MLA (9a ed.)
Tewksbury, John L. Nongrading in the Elementary School. 1967.
Precaución: Estas citas no son 100% exactas.