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