APA
Impey G., Underhill N., . (1994). The ELT manager's handbook : practical advice on managing a successful language school. Oxford: Heinemann.
Chicago
Impey Graham, Underhill Nic, . 1994. The ELT manager's handbook : practical advice on managing a successful language school. Oxford: Heinemann.
Harvard
Impey G., Underhill N., . (1994). The ELT manager's handbook : practical advice on managing a successful language school. Oxford: Heinemann.
MLA
Impey Graham, Underhill Nic, . The ELT manager's handbook : practical advice on managing a successful language school. Oxford: Heinemann. 1994.