Roger Coote. Knowledge Masters: The Earth. Young Learner Publications.
Chicagoスタイル(17版)引用形式Roger Coote. Knowledge Masters: The Earth. Young Learner Publications.
MLA(9版)引用形式Roger Coote. Knowledge Masters: The Earth. Young Learner Publications.
警告: この引用は必ずしも正確ではありません.