Gaya APA
Crystal, David. (1981).
Directions in applied linguistics / by David Crystal .
:
London : Academic Press.
Gaya Chicago
Crystal, David.
Directions in applied linguistics / by David Crystal.
:
London : Academic Press,
1981.
Buku.
Gaya MLA
Crystal, David.
Directions in applied linguistics / by David Crystal.
:
London : Academic Press,
1981.
Buku.
Gaya Turabian
Crystal, David.
Directions in applied linguistics / by David Crystal.
:
London : Academic Press,
1981.
Buku.