Butterfield, S. (1995). Educational objectives and national assessment. Open University Press.
Citazione stile Chigago Style (17a edizione)Butterfield, Sue. Educational Objectives and National Assessment. Buckingham: Open University Press, 1995.
Citatione MLA (9a ed.)Butterfield, Sue. Educational Objectives and National Assessment. Open University Press, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.