Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.