APA Style
ETHERTON, A.R.B.. (1981).
Mastering modern english : A certificate course .
New York:
Longman Group Limited.
Chicago Style
ETHERTON, A.R.B..
Mastering modern english : A certificate course.
New York:
Longman Group Limited,
1981.
Text.
MLA Style
ETHERTON, A.R.B..
Mastering modern english : A certificate course.
New York:
Longman Group Limited,
1981.
Text.
Turabian Style
ETHERTON, A.R.B..
Mastering modern english : A certificate course.
New York:
Longman Group Limited,
1981.
Print.