Citazione Stile APA (7a Edizione)
Garton-Sprenger, J., & Greenall, S. (1989). On course for first certificate. Heinemann International a division of Heinemann Educational Books Ltd.
Citazione stile Chigago Style (17a edizione)
Garton-Sprenger, Judy, e Simon Greenall. On Course for First Certificate. Oxford: Heinemann International a division of Heinemann Educational Books Ltd, 1989.
Citatione MLA (9a ed.)
Garton-Sprenger, Judy, e Simon Greenall. On Course for First Certificate. Heinemann International a division of Heinemann Educational Books Ltd, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.