Allen, W. (1983). Concise A level economics. Mercian.
Chicagoスタイル(17版)引用形式Allen, Walter. Concise A Level Economics. Staffordshire: Mercian, 1983.
MLA(9版)引用形式Allen, Walter. Concise A Level Economics. Mercian, 1983.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式