APA Style
Crystal, David. (1981).
Directions in Applied Linguistics .
London:
Academic Press.
Chicago Style
Crystal, David.
Directions in Applied Linguistics.
London:
Academic Press,
1981.
Text.
MLA Style
Crystal, David.
Directions in Applied Linguistics.
London:
Academic Press,
1981.
Text.
Turabian Style
Crystal, David.
Directions in Applied Linguistics.
London:
Academic Press,
1981.
Print.