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