Cita APA (7a ed.)
Petty, W. T. (77). The language arts in elementary schools.
Cita estilo Chicago (17a ed.)
Petty, Walter T. The Language Arts in Elementary Schools. 77.
Cita MLA (9a ed.)
Petty, Walter T. The Language Arts in Elementary Schools. 77.
Precaución: Estas citas no son 100% exactas.