Barber, J. (1977). Open university: External relations. Open University Press.
シカゴスタイル引用形Barber, James. Open University: External Relations. Milton Keynes: Open University Press, 1977.
MLA引用形式Barber, James. Open University: External Relations. Open University Press, 1977.
警告: この引用は必ずしも正確ではありません.