Gaya APA
bahri, S., hall, C, N, C, D, R. (2005).
Language Testing and Validation .
hamoshire:
Palgrave Macmillan.
Gaya MLA
bahri, Saidul., hall, Christopher, N., Candlin,, David, R..
"Language Testing and Validation".
hamoshire:
Palgrave Macmillan,
2005.
Text.