(1981). Belgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development.
Trích dẫn kiểu ChicagoBelgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development, 1981.
MLA引文Belgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development, 1981.
警告:這些引文格式不一定是100%准確.