EUROPA PUBLICATIONS LIMITDE. (1986). The world of learning 1987 (ed.37.). Europa Publications limited.
芝加哥风格引文EUROPA PUBLICATIONS LIMITDE. The World of Learning 1987. ed.37. London: Europa Publications limited, 1986.
MLA引文EUROPA PUBLICATIONS LIMITDE. The World of Learning 1987. ed.37. Europa Publications limited, 1986.
警告：这些引文格式不一定是100％准确.