Gaya APA
English for practical purposes. (1976).
Jakarta:
[s.n.].
Gaya Chicago
English for practical purposes.
.
Jakarta:
[s.n.],
1976.
Text.
Gaya MLA
English for practical purposes.
.
Jakarta:
[s.n.],
1976.
Text.
Gaya Turabian
English for practical purposes.
Jakarta:
[s.n.],
1976.
Print.