Gaya APA
Hughes, G., Tiina, I, M, J, I, R. (2007).
Practical classroom english .
Oxford:
Oxford: Oxford University, 2007.
Gaya MLA
Hughes, Glyn., Tiina, I., Moate,, Josephine, II., Raatikainen,.
"Practical classroom english".
Oxford:
Oxford: Oxford University, 2007,
2007.
.