Citazione Stile APA (7a Edizione)

Hopkins, A., & Potter, J. (1998). Work in progress: Course book.

Citazione stile Chigago Style (17a edizione)

Hopkins, Andy, e Jocelyn Potter. Work in Progress: Course Book. Edinburgh, 1998.

Citatione MLA (9a ed.)

Hopkins, Andy, e Jocelyn Potter. Work in Progress: Course Book. 1998.