Gaya APA
Widdowson, H.G.. (2000).
Language Testing .
Hongkong:
Oxford University Press.
Gaya Chicago
Widdowson, H.G..
Language Testing.
Hongkong:
Oxford University Press,
2000.
Text.
Gaya MLA
Widdowson, H.G..
Language Testing.
Hongkong:
Oxford University Press,
2000.
Text.
Gaya Turabian
Widdowson, H.G..
Language Testing.
Hongkong:
Oxford University Press,
2000.
Print.