Citazione Stile APA (7a Edizione)

Hadfield, J., & Hadfield, C. (2000). Oxford basics: Simple writing activities.

Citazione stile Chigago Style (17a edizione)

Hadfield, Jill, e Charles Hadfield. Oxford Basics: Simple Writing Activities. Oxford, 2000.

Citatione MLA (9a ed.)

Hadfield, Jill, e Charles Hadfield. Oxford Basics: Simple Writing Activities. 2000.