APA引用形式

Sapsford,David, & Ladd,James. (1978). Essential economics. Hart-Davis Educational.

シカゴスタイル引用形

Sapsford,David, , Ladd,James. Essential Economics. Great Britain: Hart-Davis Educational, 1978.

MLA引用形式

Sapsford,David, , Ladd,James. Essential Economics. Hart-Davis Educational, 1978.

警告: この引用は必ずしも正確ではありません.