Gaya APA
Richards, Jack C, Hull,Jonathan. (1980).
English for International Communication .
USA:
cambridge university press.
Gaya Chicago
Richards, Jack C, Hull,Jonathan.
English for International Communication.
USA:
cambridge university press,
1980.
Text.
Gaya MLA
Richards, Jack C, Hull,Jonathan.
English for International Communication.
USA:
cambridge university press,
1980.
Text.
Gaya Turabian
Richards, Jack C, Hull,Jonathan.
English for International Communication.
USA:
cambridge university press,
1980.
Print.