APA Style
LANGAN, John. (1987).
English Skills (3rd edition).
Singapore:
McGraw Hill.
Chicago Style
LANGAN, John.
English Skills.
3rd edition
Singapore:
McGraw Hill,
1987.
.
MLA Style
LANGAN, John.
English Skills.
3rd edition
Singapore:
McGraw Hill,
1987.
.
Turabian Style
LANGAN, John.
English Skills.
3rd edition
Singapore:
McGraw Hill,
1987.
.