Bowen, T. Open mind: Level 1 teacher's edition (Second edition.). Macmillan Education..
Citazione stile Chigago Style (17a edizione)Bowen, Tim. Open Mind: Level 1 Teacher's Edition. Second edition. London: Macmillan Education..
Citatione MLA (9a ed.)Bowen, Tim. Open Mind: Level 1 Teacher's Edition. Second edition. Macmillan Education..
Attenzione: Queste citazioni potrebbero non essere precise al 100%.