APA Style
Writing : upper-intermediate (study guide). (1982).
Jakarta:
Universitas Terbuka.
Chicago Style
Writing : upper-intermediate (study guide).
.
Jakarta:
Universitas Terbuka,
1982.
.
MLA Style
Writing : upper-intermediate (study guide).
.
Jakarta:
Universitas Terbuka,
1982.
.
Turabian Style
Writing : upper-intermediate (study guide).
Jakarta:
Universitas Terbuka,
1982.
.