Gaya APA
Crystal, David. (1971).
Linguistics .
England:
Penguin Books Ltd.
Gaya Chicago
Crystal, David.
Linguistics.
England:
Penguin Books Ltd,
1971.
Text.
Gaya MLA
Crystal, David.
Linguistics.
England:
Penguin Books Ltd,
1971.
Text.
Gaya Turabian
Crystal, David.
Linguistics.
England:
Penguin Books Ltd,
1971.
Print.