(2004). The World of learning, 2005 (55th ed.). Europa Publications.
Chicagoスタイル(17版)引用形式The World of Learning, 2005. 55th ed. London: Europa Publications, 2004.
MLA(9版)引用形式The World of Learning, 2005. 55th ed. Europa Publications, 2004.
警告: この引用は必ずしも正確ではありません.