APA-viite (7. p.)
Varley, N. (2015). Optionality and overgeneralisation patterns in second language acquisition: Where has the expletive ensconced itself? Peter Lang Edition.
Chicago-viite (17. p.)
Varley, Nadia. Optionality and Overgeneralisation Patterns in Second Language Acquisition: Where Has the Expletive Ensconced Itself? Frankfurt am Main, [Germany]: Peter Lang Edition, 2015.
MLA-viite (9. p.)
Varley, Nadia. Optionality and Overgeneralisation Patterns in Second Language Acquisition: Where Has the Expletive Ensconced Itself? Peter Lang Edition, 2015.
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