Freeland, G. E. (1939). Learning activities with self-testing exercises for America and the new frontier. C. Scribner's Sons.
Citação norma ChicagoFreeland, George Earl. Learning Activities with Self-testing Exercises for America and the New Frontier. New York: C. Scribner's Sons, 1939.
Citação norma MLAFreeland, George Earl. Learning Activities with Self-testing Exercises for America and the New Frontier. C. Scribner's Sons, 1939.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.