Citazione APA

 Hacker, D. (2007).  A writer’s reference: With Extra help for ESL Writers.  Bedford/St. Martin’s.

Stile di citazione Chicago

 Hacker, Diana.  A Writer’s Reference: With Extra Help for ESL Writers.  Bedford/St. Martin’s, 2007.

Citazione MLA

 Hacker, Diana.  A Writer’s Reference: With Extra Help for ESL Writers.  Bedford/St. Martin’s, 2007.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.