Richards , J. C. Curriculum development in language teaching. Cambridge language Education.
Citazione stile Chigago Style (17a edizione)Richards , Jack C. Curriculum Development in Language Teaching. Cambridge: Cambridge language Education.
Citatione MLA (9a ed.)Richards , Jack C. Curriculum Development in Language Teaching. Cambridge language Education.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.