Gaya APA
Gower, Roger. (1987).
Speaking Upper-Intermediate .
Hongkong:
Oxford University Press.
Gaya Chicago
Gower, Roger.
Speaking Upper-Intermediate.
Hongkong:
Oxford University Press,
1987.
Text.
Gaya MLA
Gower, Roger.
Speaking Upper-Intermediate.
Hongkong:
Oxford University Press,
1987.
Text.
Gaya Turabian
Gower, Roger.
Speaking Upper-Intermediate.
Hongkong:
Oxford University Press,
1987.
Print.