Gaya APA
Crystal, David, Davy, Derek. (1975).
Advanced conversational English .
London:
Longman.
Gaya Chicago
Crystal, David, Davy, Derek.
Advanced conversational English.
London:
Longman,
1975.
Text.
Gaya MLA
Crystal, David, Davy, Derek.
Advanced conversational English.
London:
Longman,
1975.
Text.
Gaya Turabian
Crystal, David, Davy, Derek.
Advanced conversational English.
London:
Longman,
1975.
Print.