Citazione Stile APA (7a Edizione)

Christie, D. (1999). Focus on Business: Workbook / [David Christie] (New edition.). Cornelsen & Oxford.

Citazione stile Chigago Style (17a edizione)

Christie, David. Focus on Business: Workbook / [David Christie]. New edition. Berlin: Cornelsen & Oxford, 1999.

Citatione MLA (8a ed.)

Christie, David. Focus on Business: Workbook / [David Christie]. New edition. Cornelsen & Oxford, 1999.