Impey, G., & Underhill, N. (1994). The ELT manager's handbook: Practical advice on managing a successful language school. Heinemann English Language Teaching.
Citazione stile Chigago Style (17a edizione)Impey, Graham, e Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Oxford: Heinemann English Language Teaching, 1994.
Citatione MLA (8a ed.)Impey, Graham, e Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Heinemann English Language Teaching, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.