Impey, G., & Underhill, N. (1994). The ELT manager's handbook: Practical advice on managing a successful language school. Heinemann English Language Teaching.
Цитирование в стиле Чикаго (17-е изд.)Impey, Graham, и Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Oxford: Heinemann English Language Teaching, 1994.
Цитирование MLA (8-е изд.)Impey, Graham, и Nic Underhill. The ELT Manager's Handbook: Practical Advice on Managing a Successful Language School. Heinemann English Language Teaching, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.