APA引用形式

 Understanding second language acquisition. (2023).  Understanding second language acquisition.  Routledge.

シカゴスタイル引用形

 Understanding second language acquisition.  Understanding Second Language Acquisition.  Routledge, 2023.

MLA引用形式

 Understanding second language acquisition.  Understanding Second Language Acquisition.  Routledge, 2023.

警告: この引用は必ずしも正確ではありません.