APA Style
English for occupational purposes. (1987).
Singapore:
Federal Publications.
Chicago Style
English for occupational purposes.
.
Singapore:
Federal Publications,
1987.
Book.
MLA Style
English for occupational purposes.
.
Singapore:
Federal Publications,
1987.
Book.
Turabian Style
English for occupational purposes.
Singapore:
Federal Publications,
1987.
Book.