Citazione Stile APA (7a Edizione)

Kroll, B. Second language writing, research insights for the classroom (5a ed.).

Citazione stile Chigago Style (17a edizione)

Kroll, Barbara. Second Language Writing, Research Insights for the Classroom. 5a ed.

Citatione MLA (8a ed.)

Kroll, Barbara. Second Language Writing, Research Insights for the Classroom. 5a ed.